High Level Bridge

 Kxx Q10xx xx Axxx

CHO	RHO	You	LHO
1	3	3	4
4	Pass	?

a) what are your options?
b) what do you do now?

This is from Marshall Miles' MSC-like column in the ALACBU Bridge news. I think the panel missed the point of this problem (as did the moderator), and since it's a pretty good panel, I was wondering if I am up a tree