单选题 The main purpose of the last .paragraph is to

A、 argue in favor of one side on a particularly controversial topic of cloning.
B、 display both sides' arguments on another contentious issue in cloning.
C、 redirect the readers' attention to the previously raised issue of ethics in cloning.
D、 provide further relevant information to the evaluation of cloning as a preservation technique.

【正确答案】 B

【答案解析】[注释] 总结归纳题。本题问：第5段写来是为了什么?第5段第1句陈述了在研究资金问题上克隆技术反对者的论据，而第2句则介绍了在经济能力问题上克隆技术支持者的论点。可见，选项[B]“摆出了在克隆方面另一个争论问题上双方的论据”总结归纳了第5段的写作目的。