(A) IMPs; none vul.     S   W   N   E
    S KJ87              P   P  2C   P
    H -                2D   P  2H*  P           * BWS leaf: hearts (no strong
    D KJ82              ? [BWS: 3C double         balanced alternative.)
    C 109752            negative.]

(B) Matchpts; N-S vul.  S   W   N   E
    S 1064                         1H
    H AK63              P   2H  X  3H
    D J1032             ?
    C Q2

(C) IMPs; none vul.     S   W   N   E
    S 86                       1C  1H
    H 9842              ? [BWS: X promises
    D AJ65              four S; 2H limit or
    C AQ3               stronger club raise;
                        jump-raises preemptive.]

(D) IMPs; E-W vul.      S   W   N   E
    S KJ76              P   P  1D  1S           (a) Pass, then, after P-X-P-?
    H J1085             ? (Plan required.)          (Specify);
    D -                                         (b) X, then after P-2S-P-?
    C J9763                                         (Specify);
                                                (c) 1NT.