Answer:
C. Sabe
Step-by-step explanation:
Daniel sabe hablar español y francés
Translation
Daniel can speak Spanish and French
In order for the sentence to make sense, the verb "saber" must be used so it is said "conoce" and "conocen." The verb "saber" is in infinitive now it is necessary to know the correct conjugation of the same. Grammatically the correct use of the verb can be noticed by the person in this case Daniel (third person singular), being singular, "saben" is incorrect being "sabe" as correct.