J
apan received huge sums of capital from the United States after the Second World War, using it to help build a modern industrial system.
(A) Japan received huge sums of capital from the United States after the Second World War, using
it to help build --> "sums" is plural
(B) Japan received huge sums of capital from the United States after the Second World War and used
it to help in building --> same as A
(C) Japan used the huge sums of capital it received from the United States after the Second World War to help build -->
correct(D)
Japan's huge sums of capital received from the United States after the Second World War were used to help
it in building --> "it" can't refer back to possessive "Japan's" (
according to GMAT)
(E) Receiving huge sums of capital from the United States after the Second World War, Japan used
it to help build --> same as A