An adverb is a word or set of words that modify verbs, adjectives, or other adverbs. They answer questions such as how, when, where, why, how often, how much etc.
Option A) gently means in a soft, kind way
Option B) honestly means in a truthful way
Option C) frankly means in an honest direct way
Option D) hardly means scarcely or rarely
The given sentence talks about a mother laying down the baby on the bed.
The apt adverb that describes the verb in the sentence is option A) gently.
The complete sentence is: The mother gently laid the baby on the bed.