United lowers fares if and only if both JetBlue buys planes and Delta advertises a sale, provided that American hires pilots.
A) (U ≡ A) • (J ≡ D)
B) A ⊃ [U ≡ (J • D)]
C) [U ≡ (J • D)] ⊃ A
D) A ⊃ [(U ⊃ J) • (D ⊃ U]
E) [U ⊃ (J • D)] ⊃ A

Question

Quizplus · Accepted Answer

The correct logical representation is "A ⊃ [U ≡ (J • D)]" because it states that if American hires pilots (A), then United lowers fares if and only if both JetBlue buys planes (J) and Delta advertises a sale (D). This captures the conditionality and the combination of events required for United to lower fares.

United Lowers Fares If and Only If Both JetBlue Buys