Question

I need help is it A b c Or d

Answer 1

I think it's multiplying by 5 

Answer 2

The answer is B.

The factor by which 2 changed to -10 is $\frac{-10}{2},~or~-5.$
The change for the next term is $\frac{50}{-10},~or~also~-5.$
Again, the change to the next term is $\frac{-250}{50},~being~-5.$
Since the terms are consistently increasing by -5, that is your ratio. Your answer is B, -5.