The table below shows the number of cups of food Trey's cat ate over time.

Number of Cups 3 6 9 12 15
Number of Days 4 8 12 16 20

Which statement gives a unit rate?

A.
For every day, Trey's cat ate 1.5 cups.
B.
For every cup, Trey's cat ate for 0.75 of a day.
C.
For every day, Trey's cat ate 0.75 of a cup.
D.
For every cup, Trey's cat ate for 1.5 days.