What is the correct symbolic representation of this argument? “if dr. landerberg is a popular professor, then he cares about his students. but he cares about his students if and only if both he empathizes with their problems and delivers good lectures. thus, either dr. landerberg cares about his students or both he empathizes with their problems and delivers good lectures.”
a) l ⊃ c, c ≡ (e ∙ d) .·. c v (e ∙ d) b) (l c) v (e ∙ i) .·. c v (e ∙ l) c) l ≡ c .·. c v (e ∙ l)