4 girls can do a piece o f work in 8 days, 3 boys can do tht: same piece of wo;k in 9 days, 7 men do the me piece of work in 2 days and 5 women can do the same piece of work in 4 days. Who is least efficient ?
(A) Boys
(B) Girls
(C) Women
(D) Men
(E) Boys and Men both