Fill in the blank with the most appropriate word.
_____ three languages: French, Spanish, and English.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
An auxiliary verb is a verb which gives is used in the formation of tenses, moods, tones, etc.
Option D is correct as the sentence itself indicates the use of simple present tense. Speaking and am cannot be used to fill the blank.
The other options are wrong as the sentence is in the present simple tense.
The correct answer is D) I speak