The revised sentence is: Las personas en el centro comercial nos hablan.
In the original sentence, "Las personas en el centro comercial hablan a mis amigos y a mí," the direct object (DO) is "mis amigos y a mí" which means "my friends and me."
To replace the DO with the correct pronoun, we should use the pronoun "nos" because it appropriately represents "my friends and me" collectively.
Therefore, the revised sentence becomes "Las personas en el centro comercial nos hablan," where "nos" is the correct pronoun to replace the direct object.
The full question is:
Rewrite the sentence, replacing the DO with the correct pronoun. Las personas en el centro comercial hablan a mis amigos y a mí.