A scholarly king once decided to give out prizes to the learned people of his land. The one who won the copper prize got 29 gold coins. The one who won the silver prize got 47 gold coins. The one who won the gold prize got 79 gold coins.
So, how many gold coins were given to the one that won the platinum prize?
A. "30 coins"
B. "57 coins"
C. "78 coins"
D. "91 coins"
E..112 coins"











