A Certain Capacitor, in Series with a 720- $\Omega$ Resistor, Is Being Charged

Multiple Choice

A certain capacitor, in series with a 720- $\Omega$ resistor, is being charged.At the end of 10 ms its charge is half the final value.The capacitance is about:

A) 9.6 $\mu$ F
B) 14 $\mu$ F
C) 20 $\mu$ F
D) 7.2 F
E) 10 F