Which of the following sentences are correctly punctuated? check all that apply. a) when she returned to work after maternity leave, she learned that her office had been relocated to the second floor. b) submit your expense report proposal before october 15, 2008. maurice listened to the team’s proposals and then he promptly turned them down. c) not one employee was willing to sit at the desk, that had belonged to the man who turned out to be a serial killer. d) all participants must sign in register their vehicles and report to their assigned locations before 7: 30 a. m.