Which of the following uses inanimate subject？

Which of the following uses inanimate subject？
A.Recent days have seen a flood of books in memory of this great man.
B.The city boasts a beautiful lake.
C.If you take this medicine， you will feel better.
D.People have paid more and more attention to the livelihoods of migrant workers.
正确答案：Recent days have seen a flood of books in memory of this great man.The city boasts a beautiful lake.