The correct answer is evidence.
When it comes to making inferences about something (understanding the text), we need to use everything we can from the text - and rely on evidence, on proof, on the information found in the text in order to do that. Conflict, setting, and resolution won't help us as much as evidence can.
(F) Because they can only capable of generating up to 220 volt of electricity. :)
It is comparing the speaker's solitariness to that of a cloud
A and D both fit the definition, but i would go with A