Question: What version of the smartphone modeled designed and marketed by Apple Inc. that was introduced at the WWDC 2008?

Context paragraphs:
IPhone 3G: The iPhone 3G is a smartphone that was designed and marketed by Apple Inc. It is the second generation of iPhone, successor to the original iPhone, and was introduced on June 9, 2008, at the WWDC 2008 at the Moscone Center in San Francisco, United States.

Apple Inc. v. Samsung Electronics Co.: Apple Inc. v. Samsung Electronics Co., Ltd. was the first of a series of ongoing lawsuits between Apple Inc. and Samsung Electronics regarding the design of smartphones and tablet computers; between them, the companies made more than half of smartphones sold worldwide as of July 2012.  In the spring of 2011, Apple began litigating against Samsung in patent infringement suits, while Apple and Motorola Mobility were already engaged in a patent war on several fronts.  Apple's multinational litigation over technology patents became known as part of the mobile device "smartphone patent wars": extensive litigation in fierce competition in the global market for consumer mobile communications.

IPhone (1st generation): The iPhone is the first smartphone model designed and marketed by Apple Inc.  It is the first generation of iPhone that was announced on January 9, 2007 after years of rumors and speculation.

Apple Watch: Apple Watch (stylized as WATCH) is a line of smartwatches developed, designed, and marketed by Apple Inc. It incorporates fitness tracking and health-oriented capabilities with integration with iOS and other Apple products and services.  The original generation of the device was available in four variants: Apple Watch Sport, Apple Watch, Apple Watch Hermès, and Apple Watch Edition; each distinguished by different combinations of cases and first- or third-party interchangeable bands.  Apple Watch relies on a wirelessly connected iPhone to perform many of its default functions such as calling and texting.  It is compatible with the iPhone 5 or later models running iOS 8.2 or later, through the use of Wi-Fi or Bluetooth.  Announced by Apple CEO Tim Cook in September 2014, the device was released in April 24, 2015.  The Apple Watch quickly became the best-selling wearable device with the supply of 4.2 million smartwatches in the second quarter of the 2015 fiscal year.  The second generation of Apple Watch, released in September 2016, includes two tiers: Apple Watch Series 2 and Apple Watch Series 1, which includes the S1P chip, but is otherwise identical to the original.  The Series 3 was announced at a presentation at Apple Park on September 12, 2017 and was released on September 22, 2017.

IPhone 3GS: The iPhone 3GS (originally styled iPhone 3G S) is a smartphone that was designed and marketed by Apple Inc. It is the third generation iPhone, successor to the iPhone 3G.  It was introduced on June 8, 2009, at the WWDC 2009 which took place at the Moscone Center, San Francisco.

IPod Touch: The iPod Touch (stylized and marketed as iPod touch) is an iOS-based all-purpose handheld PC designed and marketed by Apple Inc. with a user interface that is touchscreen-based.  It can be used as a music and video player, digital camera, handheld game device, and personal digital assistant (PDA).  It connects to the Internet only through Wi-Fi base stations, does not use cellular network data, and is therefore not a smartphone, though it has a similar design to the iPhone and is often referred to as the "iPhone without a data plan".  Furthermore, it does not fit in Apple's iPhone accessories such as their leather cases.  As of May 2013, 100 million iPod Touch units had been sold since 2007.

News (Apple): News is a mobile app and news aggregator developed by Apple Inc., for its operating system iOS, and launched with the release of iOS 9.  It is the successor to the Newsstand app included in previous versions of iOS.  Users can read news articles with it, based on publishers, websites and topics they select, such as "The New York Times", technology or politics.  The app was announced at Apple's WWDC 2015 developer conference.  It was released alongside the iOS 9 release on September 16, 2015, for the iPhone, iPod Touch and iPad.  At launch, the app was only available to users in the United States, but the app has since become available to users in Australia and the United Kingdom as well with the release of iOS 9.1 on October 21, 2015.  During the keynote address at WWDC 2016, it was revealed that with the forthcoming iOS 10 update the News app will undergo new icon and app redesigns along with an improved For You section organized by topics.  Furthermore, it was announced that there would be support for paid subscriptions for certain news sources and publishers as well as an opt-in system for breaking news notifications and email on top news stories.

Apple Worldwide Developers Conference: The Apple Worldwide Developers Conference (WWDC, also referred to as "dub-dub") is a conference held annually in California by Apple Inc. The event is used by Apple to showcase its new software and technologies for software developers. Attendees can participate in hands-on labs with Apple engineers, and in-depth sessions covering a wide variety of topics.  WWDC began in 1983 in Monterey, California.  Until 2007, the number of attendees varied between 2,000 and 4,200; however, during WWDC 2007, Steve Jobs noted that there were more than 5,000 attendees.  The WWDC events held from 2008 to 2015 were capped, and sold out at 5,000 attendees (5,200 including special attendees).

IPhone 5S: The iPhone 5S (marketed with a stylized lowercase 's' as iPhone 5s) is a smartphone that was designed and marketed by Apple Inc. Part of the iPhone series, the device was unveiled on September 10, 2013, at Apple's Cupertino headquarters.  It was released on September 20, 2013, along with its lower-cost counterpart, the iPhone 5c.

Apple Wallet: Apple Wallet (Wallet for short, formerly Passbook) is a mobile app included with the iOS operating system that allows users to store coupons, boarding passes, event tickets, store cards and (starting with iOS 8.1) credit cards, loyalty cards, and debit cards via Apple Pay.  It was designed by Apple Inc. and was presented at the 2012 Apple Worldwide Developers Conference (WWDC) on June 11, 2012.  The app first appeared on iOS 6 on September 19, 2012.

Supporting paragraphs: IPhone 3G IPhone (1st generation)
Answer: iPhone 3G