When mrs stanning is killed at the beginning how do the characters learn the news answers? a. they hear the news over the radio b. they learn of it when sergeant trotter gathers the suspects together c. they discover it when they hear screaming coming from the cellar d. they find out after the snow melts

This question is from the play "The mousetrap", which is a two-act play written in mystery genre. In the beginning, a women screams; "My God what's that?". Then a moment of silence is followed by a radio voice announcing the murder. Detective trotter claims that the person who murdered left a notebook behind which contained two addresses. Sergeant trotter told the group the murder victim Mrs.Maureen Lyon was actually named Maureen stanning. So, he begin to collect information from the guests.