An experiment is designed to determine if the amount of sugar in a drink affects the likelihood that bees will be attracted to it. Sample A is 100 mL of pure water. Sample B is 100 mL of water with 1 gram of sugar dissolved in it. Sample C is 100 mL of water with 2 grams of sugar dissolved in it.

All samples are placed on a picnic table. One observer is assigned to each drink. The observers count the number of bees that visit the drink during a 15-minute interval.

Which of the following is the best hypothesis for this experiment?

a. If the amount of sugar in a drink increases, then the number of bees it attracts will increase.
b. Bees prefer drinks with sugar in them.
c. If the temperature during the test increases, then the number of bees visiting the drinks will increase.