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