问题：
[单选题] We're bringing health care to"where people live and work."So declared Larry Merlo,CEO of CVS Health,an American retail-pharmacy giant,announcing a$69 billion deal to buy Aetna,a heatth insurer.One rat
A、a large market.
B、an enjoyable place.
C、an inefficient sector.
D、a difficult challenge.
参考答案：
B、an enjoyable place.
● 参考解析
