I have an homework assignment and I am looking for help

According to the 2000 U.S. Census , 80 % of Americans over the age of 25 have earned a high school diploma . Suppose we take a random sample of 120 Americans and record the proportion , p-hat , of individuals in our sample that have a high school diploma . What is the probability that less than 75 % of the sample have earned a H.S. diploma?

A. 0.266

B. 0.085

C. 0.063

D. Practically Zero

E. We cannot say because the condition for randomness, independence, or normality is not met.

F. 0.037

Its a multiple choice question