An AC Source Whose Rms Voltage Is 80 V Is

An AC source whose rms voltage is 80 V is in series with a 100 Ω resistor and a capacitor whose reactance is 200 Ω at the frequency of the source.In the figure,the rms voltage across the capacitor is closest to:

A) 66 V
B) 68 V
C) 70 V
D) 72 V
E) 74 V