—I have never been to Hawaii. What about Mike?

—_____.[ ]

A. So has he

B. So he does

C. Neither he has

D. Neither has he

某长宽尺寸为24m×15m、高度为4m的会议室为二级保护对象。若不考虑梁的影响，则至少需要设置（）感烟探测器。

A.4只

B.5只

C.6只

D.7只