Two capacitors are connected in series.

(a) If a third capacitor is now connected in series 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 generally tends to increase the capacitance, but putting it in series tends to decrease the capacitance; therefore, the net result is no change.

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

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