If 2^k = 4, then 2^(2K+2) =
Choose the most appropriate option:
A) 29	B) 45	C) 81	D) 64	E) 18

Rationale: "2 ^ k = 4 2 ^ 2 k = 4 ^ 2 2 ^ 2 k = 16 2 ^ ( 2 k + 2 ) = 2 ^ 2 k * 2 ^ 2 = 16 * 4 = 64 answer : d"
Answer: D