In 2007, 150 million people joined social network internet sites, a 400 per cent increase on the traffic in 2006. An energetic social networking industry has arrived but a business model has yet to emerge. The challenge for the industry is not how to attract users but how to make money. In particular they must work out how to generate income while reconciling the interests of the user, software developer and advertiser. The user and their social network of family and friends expect the service to be free and their privacy to be maintained. Software developers provide games and photo slideshows and in return want to promote other products and services to users. The site owner obviously wants to make money, so targets advertisers willing to pay in order to market to the millions of users. Friction is inevitable as the industry experiments with ways to realize revenue.

Question: While the passage states that a business model has yet to emerge it is clear from the passage that it is expected that revenue will be provided by advertisers.
Options:
A. true, B. false, C. uncertain
Answer: "A"