Answer:
B
Step-by-step explanation:
Well D is spoken of that way. We are to pray to the God of the Universe, but it is not the only thing we can do. I don't think I'd pick D but it is not wrong. He has a stronger point to be made.
He is saying that [we will never] abandon the cause until we have obtained our objective. Not A
The first sentence says there is no longer any room for hope. Not C
That leaves B which is the answer.