Right answer:
b. manejó
Manejó is the conjugation of the verb manejar that matches the third person singular in the preterite tense. The preterite tense is one of two simple past tenses. It is used to describe actions that took place or were completed at a certain point in the past. Finally, we can write this sentence as follows:
Después, el señor Robles manejó en su carro a su casa
