In the numerical form of the value, 913, 256.
If we deduce it as a set of individual numbers in 913
900, 000 = nine hundred thousand
10, 000 = ten thousand
3, 000 = three thousand
913 = nine hundred and thirteen thousand
Again if we combine the set word form of the number value we
will have nine hundred and thirteen thousand for 913 in 913, 256.
This is a hard one and I can see why you decided to post it here. B is most definitely wrong but the other three are all neck and neck. There are both even pros and cons of A and C but I think it would be more reasonable to adopt a general routine. So I think the answer would be C.
It means he was happy and felt good in his heart. You know when you see or do something like buy your mom a gift she loves and your heart seems to feel like it is filled with happiness? That's the feeling that I believe William Wordsworth is trying to express.
Hope this helped. Have a great day!