Astore had 100 t-shirts. each month, 30% of the t-shirts were sold and 25 new t-shirts arrived in shipments. which recursive function best represents the number of t-shirts in the store, given that f(0) = 100?

choices:
a. f(n) = f(n − 1) ⋅ 0.3 + 25, n > 0
b. f(n) = 100 − f(n − 1) ⋅ 0.3 + 25, n > 0
c. f(n) = f(n − 1) ⋅ 0.7 + 25, n > 0
d. f(n) = 100 − f(n − 1) ⋅ 0.7 + 25, n > 0