The Equilibrium Constant,K_p,equals 3

Multiple Choice

The equilibrium constant,K_p,equals 3.40 for the isomerization reaction: cis-2-butene ⇌ trans-2-butene.
If a flask initially contains 0.250 atm of cis-2-butene and 0.205 atm of trans-2-butene,what is the equilibrium pressure of each gas?

A) P(cis-2-butene) = 0.0603 atm and P(trans-2-butene) = 0.205 atm
B) P(cis-2-butene) = 0.0431 atm and P(trans-2-butene) = 0.147 atm
C) P(cis-2-butene) = 0.0735 atm and P(trans-2-butene) = 0.250 atm
D) P(cis-2-butene) = 0.103 atm and P(trans-2-butene) = 0.352 atm