The path to the beach was stony, but the boys were eager to swim, so they ran the whole way. Which word group from the sentence is an infinitive? a. to the beach b. the boys c. were eager d. to swim

The correct answer is D. to swim.

Explanation:

An infinitive is a combination of the word to and a verb, in this case, swim.

A is incorrect because the word "the beach" is not a verb, but rather a noun, so that cannot be an infinitive. B and C are also incorrect as they don't even have the word to (B is a noun, and C is a verb in past tense, so it cannot be an infinitive since infinitives have no tenses - they are just the basic form of the verb).

bro we need more information. how are we supposed to answer this?