Two capacitors are connected in parallel.

(a) If a third capacitor is now connected in parallel with the original two, does the equivalent capacitance increase, decrease, or remain the same?

(b) Choose the best explanation from among the following:

I. Adding a capacitor tends to increase the capacitance, but putting it in parallel tends to decrease the capacitance; therefore, the net result is no change.

II. Adding a capacitor in parallel will increase the total amount of charge stored, and hence increase the equivalent capacitance.

III. Adding a capacitor in parallel decreases the equivalent capacitance since each capacitor now has less voltage across it, and hence stores less charge?