In a chemical reaction involving propylene oxide and cyclohexane, if the reaction is conducted under high vacuum (HV) conditions and the product shows a 92% yield with the presence of chlorine (Cl), which of the following best describes the role of chlorine in the reaction?
A) Chlorine acts as a catalyst to increase the reaction rate.
B) Chlorine is a solvent used to dissolve propylene oxide.
C) Chlorine is a byproduct formed during the reaction.
D) Chlorine reacts with cyclohexane to form a different compound.