单选题 Why is the campaign against illiteracy more important to Third World countries?

A、 Because 98 per cent of illiterates live in Third World countries.
B、 Because illiterates in Third World countries don't know how important is the ability to read and write.
C、 Because high rate of illiteracy is setting back the national development programs
D、 Because many adults in Third World countries are too ashamed to admit they can't read and write.

【正确答案】 A

【答案解析】[试题分析] 本题考查的是对文章的理解。
[详细解答] 根据文章大意，我们可以得知有98%的文盲都生活在第三世界国家，这正是第三世界国家清除文盲的战役更加重要，更加紧迫的原因。