The reactivity of compound Z with different halogens under appropriate conditions is given below: - mono halo substituted derivative when X = 1 OH Z C(CH3)3 X di halo substituted derivative when X = Br -tri halo substituted derivative when X = Cl The observed pattern of electrophilic substitution can be explained by (A) the steric effect of the halogen (B) the steric effect of the tert-butyl group (C) the electronic effect of the phenolic group (D) the electronic effect of the tert-butyl group