单选题 According to tile "gene-culture coevolution" model, which of the following would be true at the end of the day?

A、 All people will be right-handed.
B、 All people will be left-handed.
C、 There are as many right-handers as left-handers.
D、 People will use both hands equally well.

【正确答案】 A

【答案解析】文章第二段先提到了“the interaction of genes and culture has produced a state where everyone has identical genes for handedness”，然后在第三段又提到“The model predicts that today everyone has genes which confer a basic predisposition of 78% to be right-handed”，所以答案应该为A。