Did you present the steps of the procedure as a numbered list? Did you note any changes to the
original procedure?

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

b is dominant over the allele for the white fur.

your spelling is a little off : ]