Dentify the correctly punctuated sentence. a. when it comes to the rules of etiquette, some guidelines have remained the same for decades, while others have evolved. b. some music lovers actually prefer the grainy sound of vinyl records played on a stereo, however, turntables can be hard to purchase and repair. c. many communities sponsor alcohol-free activities on new year's eve, these are a good alternative for both families and single people. d. the new president of the university will be formally inducted into office next week, a ceremony will be held at the campus center.