Let us not aggravate the sufferings of the poor.

Answer: Option B

Aggravate : make (a problem, injury, or offence) worse or more serious.
Abbreviate : shorten (a word, phrase, or text).
Alleviate : make (suffering, deficiency, or a problem) less severe.
Advocate : a person who publicly supports or recommends a particular cause or policy.
Appreciate : recognize the full worth of.

Antonym of Aggravate is Alleviate