Which of the Following Is True About Student's T-Models

Multiple Choice

Which of the following is true about Student's t-models?
I. They are unimodal, symmetric, and bell-shaped.
II. They have fatter tails than the Normal model.
III. As the degrees of freedom increase, the t-models look more and more like the Normal.

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