Make multiple choice "numbering" vs "lettering"

Hi,

I noticed that the plugin allows you to number each multiple choice option.
For example:

What color is an apple?
1. red
2. blue
3. green
4. yellow

However, I want it to look like this:

What color is an apple?
a) red
b) blue
c) green
d) yellow

Is there any way I could do this? Thank you. By the way, the plugin is amazing thank you for it.

https://ww.wp.xz.cn/plugins/wp-pro-quiz/