I know about the keep lines together and keep with next option, but in this case, I can't figure out the right logic for keeping the question and answers together.

Example: with the below, when I get to the bottom of the page, it may show the question and then, a, b, c, but d is on the next page. Any thoughts?

Q1. xxxxx
a. xxxx
b. xxxx
c. xxxx
d. xxxx

Q2. xxxxx
a. xxxx
b. xxxx
c. xxxx
d. xxxx