$392 is divided among A, B, and C so that A receives half as much as B, and B receives half as much as C. How much money is C's share?  Choose the correct choice from the following.
A) $ 212
B) $ 216
C) $ 220
D) $ 224
E) $ 228

Rationale: "let the shares for a , b , and c be x , 2 x , and 4 x respectively . 7 x = 392 x = 56 4 x = 224 the answer is d ."
Answer: D