An office set up to handle a large volume of telephone calls, especially for taking orders and providing customer service.
I think the correct answer would be A. The infinitive is the most versatile verb form because it can be used as a verb, noun, adjective and even an adverb. An infinitive verb is classified as a non-finite verb wherein it could be used as the principal verb in a sentence. The infinitive verb form of a verb is commonly preceded by the word "to". For instance: to run, to dance, to swim, to sleep etc. An example of an infinitive verb as a noun is: To swim a mile is her greatest dream. The infinitive form of the verb is "to swim"
Expiation: I think that it is between between A or D
