Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Let the argument be "Each of five roommates, Melissa, Aaron, Ralph, Veneesha, and Keeshawn, has taken a course in discrete mathematics. Every student who has taken a course in discrete mathematics can take a course in algorithms. Therefore, all five roommates can take a course in algorithms next year." r(x):x is one of the five roommates listed. d(x) : x has taken a course in discrete mathematics. a(x):x can take a course in algorithms. Multiple Choice existential generalization universal instantiation existential instantiation universal generalization