The sentence showed the part of the story where Marilyn is making letters for her family. She wants her brother to remember only the positive side of her. This is a paraphrase of the sentence. "She paused from time to time to think carefully on what words to say for her family, then she continued to write her letters."
B because the past tense of write is wrote. :)
A square is to a plane as a cube is to a volume
The answer would be B. It flows the nicest out of all 3 options and is written grammatically correct.
