Consider the following argument. Sandra knows Java and Sandra knows C++. :: Sandra knows C++. Let p = "Sandra knows Java" and q = "Sandra knows C++." Is the argument valid or invalid? Select the answer that shows the symbolic form of the argument and justifies your conclusion. O form: pva invalid, inverse error :.~ O form: q1p invalid, converse error ::p O form: qvp invalid, converse error ::-p O form: pia ::9 valid, specialization valid, specialization O form: pva :p