Which of the following is an ad hominem fallacy? Select one: a. Other brands of toothpaste might promise you "dazzling white teeth," but those corporations are deceiving you. Only Lima Bean Green Toothpaste will give you the smile you desire. b. Join the millions of trendy tooth brushers who have discovered the whitening, brightening, cavity fighting power of new and improved Lima Bean Green Toothpaste! c. The time the two of you spend together is perfect because of your dazzling white teeth. d. Try it for yourself, and you will see the difference.