Nosotros, the word "Nosotros" is the subject pronoun "We" and Pablo and I is basically saying we so Nosotros will best replace Pablo y yo
Ante ayer mis primos prefirieron ir a la playa y no a la piscina.
You'd give your name since that translates into "What is your name?" Hope this helps.
The answer is C.
In English it would say:
My cousin Pepe is a postman.
Pepe delivered mail on Sundays?
No, on Sundays Pepe and Pepe's parents watch TV at home.
Hope this helps :)