Which of the following is a valid argument? a) Premise: All cars have engines. Premise: Mustangs are cars. Conclusion: Mustangs have engines. b) Premise: Some cars have sun roofs. Premise: Liza's Honda does not have a sunroof. Conclusion: Liza's Honda is not a car. c) Premise: All airplanes have engines. Premise: 7473 have engines. Conclusion: 7473 are airplanes. d) Premise: All Mustangs have engines. Premise: All Corvettes have engines. Premise: All Ferraris have engines. Conclusion: All cars have engines. e) None of the above