A Resistor of 2 Ω and Another of 3 Ω

A resistor of 2 Ω and another of 3 Ω are connected in parallel, and this combination is joined in series with a 4-Ω resistor across a battery. If the current in the 2-Ω resistor is 2.0 A, the potential drop across the 3-Ω resistor is

A) 2.4 V.
B) 1.2 V.
C) 6.0 V.
D) 4.0 V.
E) 8.0 V.