(A) All white
There are two passes to you. You open 1D (do you?), LHO passes, partner bids 1S, and RHO doubles. A redouble would be support. It's your call.
(B) All red
LHO opens 1C, pard overcalls 1S, and RHO doubles. You're up. (You do have a fit-showing jump of 3D available if you want it.)
(C) Red vs. white
You're first to speak. What's your bidding plan?
(D) All red
Partner's first up. Here's the auction:
--- P (1C) P;
(1S) X (2S) ?
What's your call?