Which sentence contains a nonessential adjective clause? the coach explained the rules that the officials revised in 2010. the coach who is an expert in the sport explained the revised rules to us. after explaining the rules to us, the coach released us to the field. the officials revised the rules, which the coach explained to us before practice.

A nonessential adjective clause is one that isn't necessary and doesn't change the meaning of the sentence. The answer is:

The officials revised the rules, which the coach explained to us before practice.

Option- D

The following sentence contains a nonessential adjective clause, which is the officials revised the rules, which the coach explained to us before practice.   As, it provides a more detailed about a different person which is a part of the team and is described well inside the sentence.                                                                                                                                                                                                                    

Sorry, what passage, i don’t see one? i can you in pm’s if you’d like.