Redbook's Increasing Its Price Is a Sufficient and Necessary Condition

Multiple Choice

Redbook's increasing its price is a sufficient and necessary condition for People's hiring new writers, provided that Health's expanding coverage implies that Shape changes its cover.

A) R ≡ [P ⊃ (H ⊃S) ]
B) (H ⊃ S) ⊃ (R ≡ P)
C) (R ≡ P) ⊃ (H ⊃ S)
D) (H ⊃ S) ⊃ (R ⊃ P) ]
E) R ≡ [(H ⊃ S) ⊃ P]