JetBlue Buys Planes If Delta Advertises a Sale, and Frontier

Multiple Choice

JetBlue buys planes if Delta advertises a sale, and Frontier improves service only if Southwest expands routes.

A) (D ⊃ J) • (F ⊃ S)
B) (D ≡ J) • (F ≡ S)
C) (J ⊃ D) • (S ⊃ F)
D) (D • J) ⊃ (S • F)
E) (J ⊃ D) • (F ⊃ S)