Fill in the blank with the most appropriate word.
You look nice, Anne. _____ a new dress?
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 C is correct as look indicates that we are talking about the present. The present continuous tense shall be used as Anne looks nice wearing that dress.
The other options are wrong as only present continuous tense can be used.
The correct answer is C)are you wearing