Yo a los padres de mis amigos.
a. sé
b. conozco

B.

Explanation:

Translation: I know the parents of my friends.

B) conozco

Explanation:

sé would be a literal traduction from english but in spanish it would mean knowing like in knowledge.

Sé example: yo sé cómo resolver ese problema de matemáticas(I know how to resolve that math problem)

Conozco example: yo conozco a Laura(I know Laura)

hope this helps

which