In which sentence is to a part of an infinitive phrase?
a. i want to try out for the team.
b. parveen is anxious to a fault.
c. we're going to toronto for vacation.
d. jake went to college for six years.

A. I want to try out for the team.

Explanation:

Infinitive phrases use "to" with a verb. Verbs are action words.

"to try" is a verb in the infinitive form.

B. "to a fault". A fault is a noun, a thing.

C. "to Toronto". Toronto is a noun, a place.

D. "to college". College is a noun, a place.

If you study French, verbs you learn are always "to" something in the "infinitif" before conjugating. That may help you remember.

the apollo program, also known as project apollo, was the third united states human spaceflight program carried out by the national aeronautics and space administration (nasa), which succeeded in landing the first humans on the moon from 1969 to 1972.