A,B均为n阶方阵,满足AB=0且R(A)=n-2,则必有

A,B均为n阶方阵,满足AB=0且R(A)=n-2,则必有
A、R(B)=2
B、R(B)<2
C、R(B)≤2
D、R(B)≥2
【正确答案】:C