Explain how to use the midpoint formula to prove or disprove that ABCD is a parallelogram.
A)	Prove that AC and BD do not have the same midpoint. The diagonals of a parallelogram cannot have the same midpoint.	
B)	Prove that AD and BC have the same midpoint. All sides of a parallelogram are congruent; therefore, they have the same midpoint.	
C)	Prove that AC and BD have the same midpoint. The diagonals of a parallelogram bisect each other; therefore, they have the same midpoint.	
D)	Prove that AB and CD do not have the same midpoint. All sides of a parallelogram are congruent; therefore, they have different midpoints.
                                             
                                          
                                          
                                        
											