Answer:

Option: B. overseeing the building of the Hagia Sophia

Explanation:

For the student of art,  emperor Justinian I is most often remembered for Hagia Sophia. Hagia Sophia represents one of the most influential Byzantine structures ever built in the Christendom. Hagia Sophia cathedral built in the 6th century CE under the oversee of the Byzantine emperor Justinian I in Constantinople. The Hagia Sophia is not only a structure but depicts religious and artistic life for the Byzantine Empire.