Which of the following will cause a current through an electrical circuit to decrease there can be more then one answer ... A. Decrease the voltage B. Decrease the resistance. C. Increase the voltage. D. Increase the resistance

The formula for the current through the circuit is ...

Current = (voltage) divided by (resistance).

I hope you can see from this fraction that DEcreasing the voltage

or INcreasing the resistance will both decrease the current.

You have control over both of these: The voltage depends on

how many batteries or the size of the power supply you use.

The resistance depends on how many resistors you put into

your circuit, and their values. So you can adjust both of these

quantities, to make the current in the circuit be anything you want.