单选题 Studying carefully the clues in the passage, we learn that the total population of Africa is ______.

【正确答案】 B
【答案解析】[解析] 从第三段第二句句意“非洲至少有一亿文盲,占人口总数的百分之八十到八十五”可知非洲总人数。故本题答案为B。