Answer:
My grandfather, who was born eighty years ago in Puerto Rico, raised his daughters the old-fashioned way.
Explanation:
who-stands in lieu of I, she, he, us, and they in sentences?
whose-shows ownership or connection.
whom-substitutes subject pronouns like I, She, and He.
which-are inanimate items and living creatures (typically non-defining clauses).
that-for both humans and other objects (typically defining clauses).
