Task: Sequential_Recommendation

system
You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user 
Instruction: Rank the items in options and predict the user's next purchase from the listed options by analyzing her historical purchases.

Input:
Purchase History:
1st: Instep Quick-N-EZ Double Child Carrier Bicycle Trailer, 2-Passenger. Sports & Outdoors. Outdoor Recreation. Instep.
2nd: NCAA 3-by-5 Foot Flag with Grommets. Sports & Outdoors. Fan Shop. BSI.

Options:
A: Poetic REVOLUTION Case for Google Nexus 7 FHD 2nd Gen 2013 Android Tablet Black (3 Year Manufacturer Warranty From Poetic). Electronics. Computers & Accessories. Poetic.
B: WoCase Replacement Accessory Fitbit Flex Wristband Wrist Band Bracelet (Large/Small) with Clasp for Fitbit Flex Activity and Sleep Tracker (One Band+ One Clasp). Electronics. Wearable...
C: ASUS 24-inch 144Hz Full HD FreeSync Gaming 3D Monitor [MG248Q] 1080p, 1ms Rapid Repsonse Time, HDMI, DVI-D, DisplayPort, Fliker Free Display with Pivot, Tilt, and...
D: Cotton Linen Square Decorative Throw Pillow Case Cushion Cover Simple Words Beach Rules Holiday Gifts 18 "X18 ". Home & Kitchen. Bedding. Queen's designer.
E: Reed & Barton Marlborough 511 Brown Leatherette Flatware Chest. Home & Kitchen. Kitchen & Dining. Reed & Barton.
F: Peerless SF640 Universal Fixed Low-Profile Wall Mount for 32 Inch to 60 Inch Displays Black. Electronics. Accessories & Supplies. Peerless.
G: Book Shelf for Living Room, Bathroom, and Kitchen Shelving, Home Décor by Lavish Home- 5-Tier Decorative Leaning Ladder Shelf- Wood Display Shelving. Home & Kitchen...
H: USA Pan Patriot Pan Bakeware Aluminized Steel Rectangular Cake Pan. Home & Kitchen. Kitchen & Dining. USA Pan.
I: Sony MW1 Smart Wireless Bluetooth Pro Headset MP3 Player - Black. Electronics. Portable Audio & Video. Sony.
J: Eagle Claw Salmon Egg Up Eye Offset Fishing Hook. Sports & Outdoors. Sports & Fitness. Eagle Claw.
K: Can Opener Heavy Duty Tin Opener Professional Stainless Steel NO-Rust Manual Opener Ergonomically Designed Handle and Easy to Turn Knob (Black01). Home & Kitchen. Kitchen...
L: Lexar JumpDrive Firefly 8 GB USB 2.0 Flash Drive JDFF8GB-431 (Charcoal). Electronics. Computers & Accessories. Lexar.
M: KLOUD City 6 pc Silver stainless steel O shaped adjustable shackle with 4 holes for paracord bracelets plus KLOUD cleaning cloth. Sports & Outdoors. Sports...
N: Firewall Micro Appliance With 4x Gigabit Intel LAN Ports, 8GB RAM / 120GB mSATA. Electronics. Computers & Accessories. Protectli.
O: NCAA 3-by-5 Foot Flag with Grommets. Sports & Outdoors. Fan Shop. BSI.
P: Zoom Cozy Mermaid Tail Blanket,All Season Warm Sleeping Bags for kids .Cute Gift(Pink and Purple) (S, Pink). Home & Kitchen. Bedding. Zoom.
Q: Plugable USB 3.0 to Ethernet Gigabit 10/100/1000 LAN Network Adapter (ASIX AX88179 chipset Compatible With Windows 10, 8.1, 8, 7, XP, Linux, OS X/macOS, Switch...
R: D-Link DCS-934L Day & Night Wi-Fi Camera (Black). Electronics. Camera & Photo. D-Link.
S: South Shore Savannah Twin Bookcase Headboard, Pure White. Home & Kitchen. Furniture. South Shore.
T: Under Armour Men's 2.0 Shadow Visor. Sports & Outdoors. Sports & Fitness. Under Armour.


assistant
Answer: O