I need help on my Spanish 2 hw on 2.2 The Imperfect Activity 2 & 3

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.

8. a marta (interesar) mucho los muchachos

Choose one of the following locations: guayaquil, sucre, or la paz. then, write an e-mail of 7-10 sentences, in english, as if it's from a travel agent who is trying to persuade a family in the united states to visit the city you chose. in the e-mail describe the each of the following in at least two sentences each: location, culture, sites, food, and activities. your descriptions must be persuasive and different from the lessons.