Select the statement that best justifies the conclusion based on the given information.
If x + y = z and x = y, then the conclusion is x + x = z.
Aaddition property of equality
Badditive inverse
Cclosure
Dsubstitution
If x + y = z and x = y, then the conclusion is x + x = z.
Aaddition property of equality
Badditive inverse
Cclosure
Dsubstitution