read the sentence. craving a more cosmopolitan lifestyle, the rural students were excited to travel to the…

Brief Explanations:

An infinitive is formed by the word "to" plus the base - form of a verb. In "to travel", "to" is followed by the base - form "travel", which is the structure of an infinitive. A gerund ends in - ing and functions as a noun. An article is "a", "an", or "the". A pronoun is a word like "he", "she", "it", etc.

Answer:

C. infinitive