Fill in the blank with the most appropriate word.
She _____ traveled to most parts of the world.
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 the subject is singular and the sentence suggests of present perfect tense (traveled). Has is used as an auxiliary verb here, the main verb is travel.
The other options are wrong as the main verb is its third form and the subject is not plural.
The correct answer is C)has