I'm having trouble with this problem

In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 30 19 Students Given a $1 Bill 11 32 a. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill. The probability is (Round to three decimal places as needed.) b. Find the probability of randomly selecting a student who kept the money, given that the student was given a $1 bill. The probability is (Round to three decimal places as needed.) c. What do the preceding results suggest? O A. A student given a $1 bill is more likely to have kept the money. O B. A student given a $1 bill is more likely to have kept the money than a student given four quarters. O C. A student given a $1 bill is more likely to have spent the money than a student given four quarters. O D. A student given a $1 bill is more likely to have spent the money