What is the function of a linking verb? to express the subject’s physical action to express the subject’s mental action to express the condition or existence of the subject to tell what the subject does, did, or will do

Which sentence features a correctly identified compound pronoun in a prepositional phrase? a)she and i will be at the park on tuesday, waiting for mariah and them. b)the gift grandmother brought was for me and him. c)everyone is so sure that he'll be late after traveling with peter and maria. d)after they visit the grand canyon, tianna and mom are going to a spa.