In the circuit shown beside the charge on each capacitor is

A

$$(C_1 + C_2)(E_1 - E_2)$$

B

$$\frac{C_1C_2}{C_1 + C_2}(E_1 + E_2)$$

C

$$\frac{C_1C_2}{C_1 + C_2}(E_1 - E_2)$$

D

$$(C_1 - C_2)(E_1 + E_2)$$