单选题 The underlined word "hacker" (Para. 1) most probably means "______".

A、 highly recognisable names behind many of the computer technologies used today
B、 the negative connotation of those computer users
C、 a game, employing the tools that are readily available via the Internet
D、 People who break into computer systems

【正确答案】 D

【答案解析】黑客指的是计算机和网络科技的专家，可以进入计算机系统，所以D是正确答案。