Answer:
He will joke with Cassio about the prostitute Bianca, so that Cassio will laugh as he tells the story of Bianca's pursuit of him. Othello will be driven mad, thinking that Cassio is joking with Iago about Desdemona.
From the definition of absolute phrases we know that it is a modifier that attaches to a sentence without a conjunctution. So, we can say "his chubby legs, pumping" is the correct answer.
It would be my pleasure to help you out on this answer. Would it be alright if you would take a photo of the text your are going to right about?
Your answer would be A. - Apex