[Casiopea]

Fill in the blank
1. Explain why a lot of braking power (,) and a lot of engine power ____ [is, are] not relevant to an accident.

Key
A. Explain why each of these is not relevant to an accident.
B. Explain why both of these are not relevant to an accident.

Both "is" and "are" are acceptable. "is" refers to each separately, whereas "are" refers to both together.

Note, the comma is optional, but preferred for reading A. for the sake of clarity.