Answer: A) his strong belief in a woman’s domestic role.
Explanation: In the given excerpt from "Trifles" we can see the description of the County Attorney's reaction when he sees dirty towels in the kitchen, he has a violent response, by kicking his foot against the pans under the sink, and then he makes a comment about how the woman isn't a good housekeeper. This reaction demonstrates his strong belief in a woman’s domestic role.
B
An infinitive always has the word “to” before the verb
Some examples are: to sing, to dance, to play, etc.
The answer is A have a good day