Regent's Enlarging Its Casinos Is a Necessary Condition for Disney's

Multiple Choice

Regent's enlarging its casinos is a necessary condition for Disney's offering games if and only if Windstar's diversifying its activities is a sufficient condition for Costa's enlarging its nightspots.

A) (R ⊃ D) ≡ (C ⊃ W)
B) (D ⊃ W) ≡ (R ⊃ C)
C) (D ⊃ R) ≡ (W ⊃ C)
D) (D ⊃ R) ∨ (W ⊃ C)
E) (R ≡ D) ⊃ (W ≡ C)