For the reaction A(g) + B(g) `hArr` C(g) at equilibrium the partial pressure of the species are `P_(A)=0.15"atm",P_(C)=P_(B)=0.30"atm"`. If the capacity of reaction vessel is reduced, the equilibrium is re-established. In the new situation partial pressure A and B become twice. What is the partial pressure of C?
A. `0.30`
B. `0.60`
C. `1.20`
D. `1.80`