单选题 He left school after taking six O-levels because ______.

A、 he was afraid that the market might disappear
B、 he did not enjoy school at all
C、 he wanted to work on computers
D、 he wanted to become a millionaire and retire early

【正确答案】 C

【答案解析】[考点] 细节题
[解析] 从文章第三段：Brendan got his job four months ago，．．．and working for a time in a computer shop.“I got the job because the people who run the company knew I had already written some programs．”得知。