确认一道语法机警

wxd5118

As the muscles shrinks, fat take it place, and ….(什么代谢率之类的东西)
A. As the muscles shrinks, fat take it place, and
B. As the muscles shrink, fat take the place, and
C. As the muscles shrink, fat take it place, and
D. In the shrinking of muscles, fat take their place, and
E. 记不清了.好象有Shrinkage

my anwer: B please comfirm

tocean0222

agree,but confusing about whether "fat" can be a plural noun.