Answer:
Your answer would be A. Jason wants to fish
Step-by-step 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.