A couple of thoughts before the results come out.
On C, call me stuppborn. I can't defend my 3C bid but I am doing it anyway.
On E, I decided on XX. I have some thoughts on that.
On the previous round, and that's the third round, I bid 2S. It seems to me that if I had four spades partner would have heard about it before the third round. So forget about me having four spades. So what is XX? "How about: I have this good hand, you, my partner, opened the bidding, so we should have something somewhere but I am not sure where, What are your thoughts, pard?" I am not really thinking of playing 2S XX. Partner could possibly decide to pass, but I am more thinking that with Qx in spades he might decide that, having failed to bid NT on the previous round, he has denied Ax or Kx and so this might be a good time to show Qx by bidding 2NT. At any rate, I think XX asks pard for any further thoughts he might have. Passing my XX would be a surprising further thought. I expect us to be playing in NT or hearts or clubs or, I suppose just possibly, diamonds. Partner could have a 1=3=4=5 shape and bid the way he has, since he might view his xxx in hearts as not being right for immediately raising 1H to 2H.
I am expecting an all time low score for this month. But I'll live.