B for sure.
A is 100 % incorrect because the axis of the earth NEVER changes. if it did our earth would have lots of changes in climate and seasons.
I think it's A. because the Earth won't always have the same tilt throughout it's whole life. The tilt of the axis will change, even if it's just ever so slightly. I hope this helps and i hope i'm right :)
sorry but if you are looking for an answer I don't know one. :(