Mr. Carter likes to have several cups of coffee and tea throughout the day, but he needs to keep his caffeine intake under the recommended daily limit of 400 milligrams. Each cup of coffee has 96 milligrams of caffeine, and each cup of tea has 47 milligrams of caffeine.
Let c represent the number of cups of coffee and t represent the number of cups of tea. Which pairs (c,t) represent possible amounts of coffee and tea Mr. Carter could have? choose the correct answer
a. (2, 4)
b. (1, 7)
c. (0, 8)
d. (3, 3)