Anexo : Que va unido a otra cosa de la cual depende o con la que está muy relacionado.
Por los años, poco a poco mi bisabuelo se <span> í</span><span>ntegra a la vida de los EE.UU.</span>
The answer is A because all the others are wrong. You are saying that Marcos was studying when I arrived at his house.
Answer:
Ser is used in a simple way, to talk about WHAT something is (permanent state). .