The correct answer is: A. The speed-breakers were considered a menace to smooth driving by the drivers.
The other options are incorrect because they do not accurately reflect the meaning of the sentence. Option B is incorrect because it uses the preposition “according to” instead of “by.” Option C is incorrect because it uses the verb “considered” instead of “were considered.” Option D is incorrect because it uses the noun “drivers” instead of “speed-breakers.”
The sentence is in the passive voice, which means that the subject of the sentence is acted upon by the verb. In this case, the subject is “speed-breakers” and the verb is “were considered.” The object of the sentence is “a menace to smooth driving.” The prepositional phrase “by the drivers” tells us who is doing the acting.
The sentence can be rewritten in the active voice as follows: “The drivers considered the speed-breakers a menace to smooth driving.” In this version of the sentence, the subject is “drivers” and the verb is “considered.” The object of the sentence is still “a menace to smooth driving.” The prepositional phrase “to smooth driving” tells us what the drivers are considering the speed-breakers to be.