PLZ HELP HURRY Which sentence has a pronoun-antecedent error?

A)Everyone who wants to succeed in life needs to manage his or her money.
B)When e-mail goes down, every one of the teachers holds their breath anxiously.
C)Harrison wasn't sure if his work was good enough to pull an A in his biology class.
D)The two men hadn't seen each other since graduation, so they almost didn't recognize each other.

The one certain thing about the message you sent to the receiver is that the receiver will: a)process the information sequentially, not simultaneously. b)interpret it based on their framework of experience. c)not be able to interpret all the relevant information. d)revise his/her premises according to the information sent.

Read this excerpt from the exposition in "the monkey's paw." father and son were at chess, the former, who possessed ideas about the game involving radical changes, putting his king into such sharp and unnecessary perils that it even provoked comment from the white-haired old lady knitting placidly by the fire. what is one piece of information you can infer about the story from this sentence? a. the father in the story is possessed, so he probably says insane things a lot. b. the woman in the story is knitting, so the characters probably don't have good clothes to wear. c. the father is playing chess with the son, but the son is not old enough to know the rules. d. since the father likes taking risks in a game, he might like taking risks in life as well.

Evaluate the tone of this cover letter. is it appropriate?