A.80×(P/F,10%,2)+80×(P/F,10%,3)+80×(P/F,10%,4)+80×(P/F,10%,5)
B.80×[(P/A,10%,6)-(P/A,10%,2)]
C.80×[(P/A,10%,3)+1]×(P/F,10%,2)
D.80×[(F/A,10%,5)-1]×(P/F,10%,6)
E.80×[(P/A,10%,6)-(P/A,10%,3)]