2) What was the most significant architectural contribution of the Byzantine Empire and what did it stand for? Who commissioned the construction? When was it built?

Hagia Sophia

Explanation:

Hagia Sophia depicts one of the most prominent Byzantine buildings ever constructed in the Christendom. The Hagia Sophia is not only a structure but represents religious and artistic life for the Byzantine Empire. The painting of Gods, kings and Queens, and the decoration of mosaics and frescoes are the features of Byzantine art in the Hagia Sophia. Hagia Sophia cathedral built under the command of the Byzantine emperor Justinian I in Constantinople in the 6th century CE. Emperor Justinian I is remembered for Hagia Sophia and the Corpus Juris Civilis.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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the percentage of students at the school need special diets is

c) 10 percent