In an open switch RC series circuit with resistance R and a capacitor C, what happens to the voltage across the capacitor when the switch is closed after being open for a long time?
A. The voltage across the capacitor immediately jumps to the supply voltage.
B. The voltage across the capacitor remains zero.
C. The voltage across the capacitor increases exponentially over time to reach the supply voltage.
D. The voltage across the capacitor decreases linearly over time.