Is the socks and shoes “ cuesta or cuestan “

Can someone me with these questions ?

Because a person who loves justice is considered romantic

When could you attach the direct object pronoun to an infinitive verb? a: when an infinitive verb follows a conjugated verb. b: when an infinitive verb ends in a question. c: when a stem-changing verb ends in a question. d: when a stem-changing verb follows a conjugated verb.