34Organic Reaction Types MechanismsEasy1 markWhich equation represents a substitution reaction?ACH3CH2Cl + Cl2 → CH3CHCl3 + HClBCH3CH2OH → CH2CH2 + H2OCC2H5OH + 3O2 → 2CO2 + 3H2ODCH2CH2 + HBr → CH3CH2BrGrade answerGrading criteria