9. Which of the following scenarios is exponential with a base of 2?
A. The number of teams in the kickball tournament is decreasing by half each round.
B. The number of blooms in the rose garden is increasing by 2 blooms each week.
C. The amount of money in Nyah’s savings account is increasing by 2% each year.
D. The number of friends Joey is making in school is doubling each month.