Answer: B.
Explanation: i’d imagine it’s B, since you wouldn’t need gloves if BOTH vehicles are off and you need to touch the connections anyway. Obviously, if you’re working on something electrical (especially if it’s DC) you would want it to be off. D is immediately wrong because you can’t use the force to connect the jumpstarters (Unless of course, you’re a real life jedi.)
have a good day.
If I am understanding the question correctly, the constant or control is what stays consistent throughout the experiment.
Answer:
the source was written by an expert in the topic shes writing about.
and
the source was published in 2010 and it was updated in the last month