Which of the Statements Correctly Compares T-Distributions to the Normal

Multiple Choice

Which of the statements correctly compares t-distributions to the normal distribution?
I. t distributions are also mound shaped and symmetric.
II. t distributions have less spread than the normal distribution.
III. As degrees of freedom increase, the variance of t distributions becomes smaller.

A) I, II, and III
B) II only
C) I only
D) I and II only
E) I and III only