Question

which verb form best completes the sentence?
ellas ______ al hermano de susana.
a. saben
b. conocen
c. conozcan
d. sabemos

Explanation:

1. First, identify the subject: Ellas is a 3rd-person plural feminine pronoun (they).
2. Distinguish saber vs conocer: Conocer is used for being acquainted with people, while saber refers to knowledge/facts. The sentence refers to knowing a person (Susana's brother), so conocer is correct.
3. Match verb conjugation: The 3rd-person plural present tense of conocer is conocen. Conozcan is subjunctive, which is not needed here. Saben (3rd-person plural saber) is incorrect for the meaning, and sabemos is 1st-person plural, which does not match Ellas.

Answer:

B. conocen