Jag,
I agree yes, that the nose will attempt to return to the original position, but the restoring force is theorectically excessive and the question isn't specific as to whether we are talking about static or dynamic stability. One of the key characteristics of swept wing aircraft is the dutch roll, therefore one of the key defining characteristics of swept wing aircraft is a comparatively weak directional stability when compared to spiral stability leading to much more neutral and possibly unstable dynamic directional stability! Hence yaw damper systems.
I have no idea what answer they are looking for, but in my mind adding wing sweep to the equation prioritises reduced directional stability considerations.