The correct way to make the word "visible" into an adverb is "visibly". So the correct option among all the options given in the question is option "A". To answer these type of questions, it is important to understand the meaning of adverb first. An adverb is actually a word that modifies a verb, adjective, another adverb, noun phrase sentence and clause. Adverbs are considered traditionally as parts of speech.
There are numerous sentences used by us where the word
visibly is used.
New York is an Urban community. Urban communities generally have high population densities as well as a large number of commercial buildings, houses, roads etc. A suburban community is generally located in the outskirts of a city or urban neighborhood. These generally have more houses and less commercial buildings and the like. Lastly a rural community is located outside the urban community and has a low population density.
