Using the Central Limit Theorem for a Normally Distributed Variable

Multiple Choice

Using the central limit theorem for a Normally distributed variable, how would the standard deviation of the sample means for samples of size 200 be related to that of samples of size 3200?

A) It would be 1/16 as large.
B) It would be 1/4 as large.
C) It would be 4 times as large.
D) It would be 16 times as large.