Answer:
A. Attacks on trenches were deadly.
C. Defensive weapons were better than offensive ones.
D. Trenches were designed for defense.
Explanation:
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One government reform enacted in the Chinese Tang dynasty was its emphasis on education. It was one of the reforms that contributed the dynasty’s success. The Tang rulers did not feel that a well-educated people is a threat to the government. For the rulers, an educated public is a foundation of a stable and prosperous society. Unlike other forms of government who feared intellectuals, the Tang dynasty embraced knowledge and education, thus, encouraging its people to have a form of education.<span> </span>
Historically, the caliphates were polities based on Islam which developed into multi-ethnic trans-national empires. During the medieval period, three major caliphates succeeded each other: the Rashidun Caliphate (632–661), the Umayyad Caliphate (661–750), and the Abbasid Caliphate (750–1258).
<span>The answer is D) suppliers</span>
