In which sentence are the words in a bold an infinitive?

A. jason wants to fish

B. jason wants to fish early at the lake

C. jason wants to fish early

D. jason wants to fish early at the big lake

Your answer would be A. Jason wants to fish

Explanation:

"to fish" is an infinitive because it begins with with the word, "to." Usually infinitive phrase start with "to" but do not mistake it for a preposition. "Fish" is a verb so it would be an infinitive phrase, a preposition would be: "They all went to the restaurant." An example of an infinitive phrase would be, "Her commitment to work was impressive."

Therefore, your answer would be, Jason wants to fish.