单选题 What does the underlined word spam in the first paragraph probably refer to?

A、 Unwanted electronic information that roaches computer users.
B、 Computer virus that causes computer communication difficulties.
C、 Advertisements sent out by companies who want to sell their products.
D、 Companies that send out millions of copies of the same sales information.

【正确答案】 A

【答案解析】[考点] 词义理解题 [解析] 此题考查词义猜测能力。此题重在分析篇章结构和理顺行文逻辑。