Propellants are chemicals used to power rockets, much like gas is used to power cars. A rocket scientist has been using Propellant X in her rockets for many years, but is interested to see if Propellant Z will cause her rockets to rise higher into the air. The scientist builds a rocket that uses Propellant Z. A proper control for the experiment would be an identical rocket that uses which of the following? (SC.7.N.1.1) A. Propellant X B. Propellant Z C. No propellant D. A mixture of both Propellant X and Propellant Z