The above diagram is a circuit that consists of three capacitors **A**, **B** and **C** with capacitances \(C_0,\) \(C_0\) and \(2C_0,\) respectively, and a resistor with resistance **R**. The voltage of the power supply, \(V,\) is constant. Which of the following statements is correct?

a) When the switch **S** is open, the charged electricity of the capacitor **A** is twice as large as that of the capacitor **B**.

b) When the switch **S** is closed, the charged electricity of the capacitor **C** is twice as large as that of the capacitor **B**.

c) The electric energy charged on the capacitor **A** when the switch **S** is open is the same as that when the switch **S** is closed.

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