Which sentence contains a correctly identified compound pronoun in a prepositional phrase. the bold words are the identified and are put in parenthesis

a. while waiting in line, sara stood near (him) and (her).

b. (she) and (i) will be at the park on tuesday, waiting for mariah and them.

c. everyone is so sure that he'll be late after travelling with (peter) and (maria).

d. after they visit the grand canyon,(tianna) and (mom) are going to a spa.