Can someone please help to correct each false statement?

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.

¿cuánto cuesta el traje negro? (1 point) question 7 options: 1) $110 2) $120 3) $100 4) $200

Why are windows so white like white people