A、An experiment. B、A day job. C、A dream coming true. D、A promising career. A事实细节题。短文中间部分明确提到，Kevin Rose是把Digg网站当做一个实验开创的，因此答案为A)

For two months after he started the website digg. com, Kevin Rose didn’t need an alarm clock. "By 6 a. m. , I was up and on the computer," he recalls. "(26)It was the sheer fear of not knowing what was on my own home page."
   Here’s why: experienced editors do not deliberate over Digg’s front page. It’s strictly a popularity contest. Users post news stories and images  found anywhere from the websites of big newspapers to small blogs—and with the click of a button, other users either "digg" the items (meaning they like them) or "bury" them (meaning they don’t).
   (27)Kevin Rose started Digg as an "experiment". But he quit his day job within months, Today, the site gets 35 million different visitors a month. When he started Digg, he thought, "If this can pay my rent and I can stay cool in my apartment and drink my tea and have an awesome little office, that’d be more than I could ask for." As a child in Las Vegas, Rose was "the most unpopular kid in school". In the early ’90s, he persuaded his parents to buy him his own computer, which he used to talk technology in chat rooms.
   (28)Like many websites, Digg hasn’t yet figured out how to transform its traffic into profit. Nonetheless, it continues to develop. Digg now recommends stories to users based on other stories they like. It also lets them vote on questions they want to ask politicians and famous people.