Which of the following was a major Byzantine industry?

A. concrete
B. mining
C. weapon making
D.silk weaving
The answer is D. silk weaving.

Yes, D.

To determine which of the given options was a major Byzantine industry, we can briefly discuss each option and eliminate the ones that do not fit. Here's how you can find the answer:

A. Concrete: While the Byzantines did make significant advancements in the use of concrete, it was not a major industry but rather a building material employed in their architectural projects.

B. Mining: Mining was an important economic activity in the Byzantine Empire, but it was not considered a major industry, as it was primarily done to extract valuable metals and minerals.

C. Weapon making: Although the Byzantines were known for their military prowess and produced a wide range of weapons and armaments, weapon making alone cannot be considered a major industry.

D. Silk weaving: Silk weaving was indeed a major industry in the Byzantine Empire. The production of silk and the weaving of luxurious silk textiles became an essential part of the Byzantine economy and trade. The Byzantines enjoyed a monopoly on the silk trade for many centuries and played a significant role in its production and distribution.

Therefore, the correct answer is D. silk weaving.