"Of" is a preposition in the phrase "Of studying" and "until" is another, as well as "to" in the phrase "to college" so there are 3 in that sentence.
Answer:
girl or boy this is more then one
Explanation:
The answer is c, because the men know that if Curley has found Lennie, they would of tortured him and killed him brutally, and so George wanted to shot him out of mercy