Answer:
D
Step-by-step explanation:
Its 5x (on bottom row, its the simplest way to put it), and 625 x 5 = 3125, then 3215 x 5 = 15625. So its D.
If you look closely, you may see a pattern in the denominators.
the 1st one is 5,
the 2nd one is 5²
the 3rd one is 5³
so it is only reasonable that the next 2 are 5^4 and 5^5
