Which of the following sentences demonstrates correct pronoun-antecedent agreement? a. the teacher, eager to get started on the next assignment, shared colorful clay with her class for decorating his pots. b. every boy on the team, at the last practice of the week, was told to do their best in the basketball game. c. kate's teacher, frustrated by the mess, asked them to put all her books away and take out the art supplies. d. ron and i, after a busy month at work, went to the beach during our last vacation, and both of us had a great time.