Two Identical Resistors Are Parallel to Each Other,and the Combination $\varOmega$

Multiple Choice

Two identical resistors are parallel to each other,and the combination is in series with a 5.0-nF capacitor,in a circuit with a switch open.If initially 15.0 V is across the capacitor,and 11 ns later the voltage across the resistor pair is 2.5 V,what is the resistance of each resistor?

A) 2.5 $\varOmega$
B) 1.2 $\varOmega$
C) 0.12 $\varOmega$
D) 0.24 $\varOmega$