If 5^10 x 2^10 = 10^n what is the value of n?  Choose the correct choice from the following options.
A) 16
B) 14
C) 12
D) 10
E) 18

Rationale: "5 ^ 10 * 2 ^ 10 = 10 ^ n or 10 ^ 10 = 10 ^ n n = 10 d"
Answer: D