I am trying to create a question with two parts with both parts being multiple choice, but I cannot find the function to allow me to do that.  

For example:

Part A. What is the theme of the passage?

a.  

b.

c.

d.

Part B. What quote from the passage supports the answer to Part A?

a.

b.

c.

d.

If someone could help me, it would be greatly appreciated.