I believe this is for the "Algebra With Pizzaz" math worksheet, page 32. There are 40 spaces, and when all of the equations are solved, the punchline should appear as "he really enjoys swinging nightclubs". If you need assistance with math equations, you would need to post the question in the Math section of Brainly.
B. His or her. Because the other ones are not correct grammar. I might be wrong and if I am the answer is A. Their.
Yeahh Letter A is correct