Well most likely D. because you are suppose to use the masculine form with masculine nouns. It can also be C.
B because you need the past tense of tú
1. Mis padres eres viejo pero mis abuelos eres mayor.
(I can’t do the rest because I don’t know about your family lol)
Después de la muerte de Franco, su sucesor Juan Carlos se convirtió en rey, lo que dio lugar a una nueva era en la historia de España.
English: After Franco passed away, his successor Juan Carlos became king which lead to a new era was formed in spanish history.
—Evidence—
On 22 November 1975, two days after the death of dictator General Francisco Franco, Prince Juan Carlos was sworn in as King of Spain.
Vivimos en San Diego. not entirely sure if that was the correct use of the verb, but it should be :)
