(B) Groups that withdraw electrons from the benzene ring via the inductive effect or resonance effect are meta-directing. $-SO_3H$ is a strong electro

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(B) Groups that withdraw electrons from the benzene ring via the inductive effect or resonance effect are meta-directing. $-SO_3H$ is a strong electron-withdrawing group ($-M$ effect),which deactivates the ring and directs incoming electrophiles to the meta position. In contrast,$-Br$,$-CH_3$,and $-OH$ are ortho/para-directing groups.