The ketone shown is treated with LDA in THF at $-78^{\circ }$C. Which structure shown is the enolate formed under kinetic control?

The ketone shown is cyclohex-2-enone. The alpha' protons at C6 are the only alpha protons that are removed quickly by LDA at low temperature, giving the cross-conjugated kinetic enolate (C1=C6 with the C2=C3 bond retained). The extended, fully conjugated dienolate formed by removal of a gamma proton at C4 is the thermodynamic enolate, and the other structures are not enolates.