Astudent solved this problem and said the answer is quarts

jason mixed three kinds of juice to make punch. he mixed quarts of apple juice, quarts of grape juice, and quarts of cranberry juice. what was the total amount of juice in the punch?

is the student's answer reasonable?

a.
yes, the answer is reasonable.

b.
no, the answer is not reasonable. it should be about 3 quarts.

c.
no, the answer is not reasonable. it should be a bit less than 5 quarts.

d.
no, the answer is not reasonable. it should be a bit less than 6 quarts.