Right answer:
Decidimos venir a este restaurante porque mi jefe me lo recomendó
In this lesson, we have two important words, me and lo. So me is the indirect object pronoun for the first person singular. An Indirect Object is the person, animal or thing that receives the action of a verb, that is, the recipient of the direct object. On the other hand, the word lo represents the direct object pronoun for the third person singular. A direct object pronoun replaces a direct object, that is a noun that directly receives the action of a verb in a sentence.