From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. I've forgotten...to...

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences.
I've forgotten...told me that story

Answer Details

The most appropriate option to complete the sentence is "who". This is because "who" is an interrogative pronoun used to ask questions about people. In this sentence, the speaker is asking about the person who told them a story. The other options do not fit grammatically or semantically in the sentence. "Who me" is redundant, as "who" already implies asking about a person. "By whom" is a more formal construction that could be used in some contexts, but it sounds awkward in this sentence. "Which" is used to refer to a choice between options or things, not people, so it does not fit in this context.