Which sentence has an error in pronoun-antecedent agreement?

a) everyone i know who has seen the current high school play considers it one of the best he has ever seen.

b) anyone who has ever put a pen to paper for creative purposes can contribute their work to our new poetry anthology.

c) each of you in mrs. dalrymple's science class needs to turn in his or her science project by the end of the day on friday.

d) all the people were rooting for the basketball team to make it into the playoffs, but all their hopes were dashed by defeat.