HURRY!! PLEASE I DON'T HAVE THAT MUCH TIME ON MY TEST! >0<

According to the reading selection, "Critter Calculations: Animal Math," what evidence do scientists use to show that monkeys can distinguish between different number amounts?

a. Scientists measure how long the monkeys look at something.

c. Scientists watch the monkeys' interaction with each other.

b. The amount of food they eat helps them distinguish between amounts.

d. The more they sleep, the more focused they are.