Respuesta :
					                   I would say A. Mainly because the teacher is well trained for situation where it's critical or something like that.. 
					                
					                
					             
					                   i would think it is to follow all instructions given by the teacher. if all instructions are followed than there should be no need to have 911 programmed into a cell phone. and whether the students talk or not is determined by the teacher. furthermore, the teacher should be the one to show students were the laboratory equipment are.
					                
					                
					              
					                  