The correct answer is letter b.
The excerpt is written in the Simple Past and narrates a series of events that happened in a sequence.
Notice the verbs in the Simple Past : wept, wailed, fell, faded and died.
There is a verb missing in the part " the earth stiff and cold" The verb is grow, the Simple Past form is grew, therefore " the earth grew stiff and cold" is the correct way.
Letter A is wrong because there's a verb missing.
Letter C and letter D " the earth was growing stiff and cold" the verb grow is in the Past Continuos, " the leaves were falling from the sorrowing trees" the verb fall is also in the Past Continous breaking the pattern stablished.
I guess that all you have to do is focus, don't procrastinate. Shut off anything that might distract you, like put away your phone. Don't even listen to music, because sometimes that just breaks concentration. Considering how you've been trying to study for the past 2 hours, try taking a break. And continue to take short breaks so you don't get too tired!
I hope this helped haha! I've had far too much experience with the same issue.
Singular means there's only one
So the answer is cheese is