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Two identical capacitors, have the same ...

Two identical capacitors, have the same capacitance C. One of them is charged to potential `V_1 `and the other `V_2`. The negative ends of the capacitors are connected together. When the poistive ends are also connected, the decrease in energy of the combined system is

A

`1/4C(V_^2-V_2^2)`

B

`1/4C(V_^2+V_2^2)`

C

`1/4C(V_1 - V_2)^2`

D

`1/4C(V_1 + V_2)^2`

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