Answer:
I would say that by "No later light has lightened up my heaven", the speaker means that she has not fallen in love since her lover's death. The correct answer is B.
Explanation:
I think B is the most suitable answer because those lines have definitely nothing to do with religion, and I would say that by heaven, she means heart. So, in these lines she is saying that no one ("no later light") has touched her heart ("has lightened up my heaven") since he/she did it, or in the way he/she did it. I think the speaker is using a metaphor.
