Well I can’t answer it because I don’t know the story, but I can tell you this. Look for context clues and words around the sentence that can help explain the meaning of it.
Answer:
Paul Goddard- Charley's father
Ma Goddard- Charley's mother
Orren Goddard- Charley's younger brother
Charley Goddard- Main Character
With Margot was an "old photograph" I think she looked back a lot. And with the forest, there may have been a lot of color. To add a more definite answer, I'd need some more context.<span />
I go with "Whom". It makes sense.
A is your answer, hope that helps