Answer:
The correct answer is D: CCl₂CH₂CCl + Cl₂ → CCl₃CCl₃ + H₂
This reaction represents the chlorination of ethane (CCl₂CH₂CCl) in the presence of ultraviolet (UV) radiation, resulting in the formation of hexachloroethane (CCl₃CCl₃) and hydrogen gas (H₂).