The mood of the poem, I don't know because I don't know what the poem is. But, you can find the poem by reading it. If it is like this:
The world is covered in pitch black.
And as I walk, I don't look back,
I'll never return, I'll go on my own.
The world is covered in pitch black.
It seems like a somber and quiet poem. But if it's like this:
We jump up and down ready to go
See our new gift, see our new toy.
We arrive, and I scream with joy.
At our new gift, at our new toy.
Its more like a happy and cheerful poem. Hope this helps!
AYE SIR!
Out of all the pronouns, "whom" makes the most sense grammatically. This allows us to narrow it down to A or D.
In order for it to be the object of a preposition, there would have to be a preposition in front of it. "For," however is <em>not</em> a preposition. In fact, there isn't a preposition in the whole question.
This leaves us with option D, which is the correct answer.
You can better tell it's a direct object if you flip the sentence around a bit.
Your sister is waiting <em>for whom</em>?
"Whom" is essentially receiving the action. "Whom" is what your sister is waiting for.
Answer: D. whom; direct object.
