A 3♠
I initially thought I should pass. On further reflection partner cannot have anything much weaker than something like ♠AJ109xx, ♥Ax, ♦ xxx, ♣Kx. Here you would expect to make 9 tricks. If we give opps 5HCP opposite 12 then partner could have 15 say ♠ AKJ109x, ♥Ax, ♦xxx, ♣Ax and we likely make 10 tricks. It is a tall order but could partner have these “right” cards. So, I need to raise to 3♠ to find out.
B 2♥
I cannot bring myself to make the gross underbid of 2♦ (or 2♣). The problem is can I pass 2♠ or 3m for that matter? I would say, yes I can, even if it breaks a BWS rule. At least I have made a token effort that a very passable bid of 2♦ does not do.
C 1♦
Easy
D 3NT
Give partner an average hand with 12HCP. ♠ KQJxx, ♥ Kxx, ♦x, ♣Axxx and give East ♠x, ♥ xx, ♦AKJxxxx, ♣ Jxx . I back 3N rather than 4♠ with these hands.
E 1♠
Partner likely does not have a 4 card major and so either is weak with a ♦ suit or balanced weak. I do not like jumping to 3♣ with this suit. OTOH a game forcing jump shift to 2♠ is out because I do not have a game forcing hand opposite a minimum response. A 3♥ splinter surely also must be a game force. That leaves 1♠. If partner does have 4 spades and raises to 2♠, then I know partner has a good hand with at least 5♦ and 4♠ and we could be investigating a slam in ♦s.
F 1♠
I Like Dickhy I am also also a fan of 2-way xyz. However, I do not think this is the hand for it. I will go for the 1♠ lie, as it is a safe lie. OK if partner has 4405 distribution, we may not be able to get out of a ♠ contract but that is most unlikely.
G 2♠
Which bid is the least of evils?
3♣? Then we never find our 4-4 ♠ fit.
Double? Then what do we bid when partner bids 2 or 3♥?
2♠ Yes, the least of evils to go for. It will probably score badly though.
H K♥
Why not?
Judging from other iac ers choice, my choice is likely to be low scoring. Then so be it.