单项选择题

A.P(P/F,i,ι)=A(PlA,i,-n-m)(P/F,i,m)
B.P(F/P,i,m-ι)=A(P/A,i,n-m)
C.P=A(P/A,i,n-m)(P/F,i,m-ι)
D.P(F/P,i,n-ι)=A(F/A,i,n-m+1)