Question

The initial effects of the atomic bomb dropped on Hiroshima and Nagasaki were

(A) there was heavy damage only within a mile of the bomb's impact
(B) the entire city was razed to the ground and nothing left standing
(C) there was a cloud of fallout that spread far and wide beyond Japan
(D) there was destruction of the centers and only a few structures left standing

Hi I'm really suck between (A) and (D) any help would be greatly appreciated!