C because you need the reader to imagine it
B. I assume because none of the other words would make sense in the sentence when it has the word of. XD
★ Formula Applied :




★ Explanation :

Lets use substitution method ,
Let , u = sin2x
⇒ du = 2.cos2x.dx





★ Alternate Method :




]

Answer:
There are many themes that Forster put into his story but the main and overlying theme or idea that he seems to be trying to get across to his readers is human dependency on technology and the danger therein. He is trying to warn his readers of the danger in humans relying too much on their creations.
Explanation:
<h2>
<u>Question</u><u>:</u><u>-</u></h2>
I understand that i could not rely upon her to get a job done. (change into paasive)
<h2>
<u>Answer</u><u>:</u><u>-</u></h2>
The passive voice always uses the past participle form of the main verb irrespective of any tense.
So the sentence will be- I could not rely upon her to get a job done, I understand.
<h3>
~</h3>