For those fluent in Spanish, I need help with 1-4

Select the word from the list that best fits the definition de pequeña siembre las mismas canciones.

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.

Which verb form best completes this sentence? a paco no le gustan estas pinturas porque él no el arte de los siglos pasados. a. comprendes b. comprende c. comprendo d. comprenden