Which sentence has a pronoun-antecedent disagreement error?

a. each journalist has to decide what beat they want to cover.

b. it was so crowded that one of the girls lost her doll.

c. every student should hand in his or her assignment.

d. every boy scout has to sell his own cookies.

Read the following excerpt from the play a raisin in the sun by lorraine hansberry: johnson (this usa woman who decided long ago to be enthusiastic about everything in life and she is inclined to wave her wrist vigorously at the heigh of her exclamatory comments.): hello there, yourself! h’you this evening, ruth? which assumption about johnson is most likely true based on the stage direction? a. her enthusiasm is used to mask her fear of public places