The number of members of an online community increases each month. The function M(t) = N(1 + r)^t represents the number of members at month t, where N is the initial number of members and r is the rate of increase. Select the correct statement.


A. The value of M is a product of N and a factor that does not depend on N.

B. N increases each month.

C. The function is linear.

D. The initial value is (1 + r).