Emily Always Talks Out in Class,often Interrupting the Teacher and Causing

Multiple Choice

Emily always talks out in class,often interrupting the teacher and causing disruptions.In order to deal with these interruptions,Emily's teacher has started to criticize Emily for her lack of control each time she speaks without raising her hand.If Emily's disruptive behaviour increases,then the teacher's methods constitute which type of contingency

A)  negative reinforcement
B)  positive reinforcement 
C)  negative punishment
D)  positive punishment