Money spent by a nonprofit to support a candidate which does not have to be reported is called

I believe the answer is: Dark money
The regulations that created by a certain candidate could determine the amount of profit that companies could take from their operation.
Because of this, many companies set aside 'dark money' to be invested toward the campaign of a specific candidate whose regulations would works in companies' favor.

Ithink it would be choices a and b. hope this !