With the popularity of ______ cell phone, more and more people are addicted to it and do less and less face-to-face communication, which has become _______ widespread concern.

A．the; a

B．\; \

C．the; \

D．a; the

某商品流通企业为了扩大销售额，选定了四种方案，四种方案所需费用与可能得的销售额的预计数如下表所示：

用价值分析方法选择比较满意的方案是（）。

A．方案一

B．方案二

C．方案三

D．方案四