<u>Answer:</u>
(A) Studying algebraic equations in math.
This was made possible by contributions of Islamic civilizations
<u>Explanation:</u>
“Muslim scholars” contributed largely in the field of Mathematics in the golden age of Islamic civilization. “Arabic number system” is widely used even today.
The first great achievement was introduction of ‘’Arabic numerals’’. It explains the "place-value" theory, which allows numbers to be expressed by “nine figures” and zero. This development made calculation very simple and also paved the way for the development of a completely new division of mathematics which is “algebra”. Even Arabic words entered Western vocabulary like “Al-JABR” became “Algebra”.
German declaration of Submarine Warfare
Zimmerman Telegrams
The person that makes economic decisions in a command economy is the government
The greeting was stench
This stench came from various sources including but not limited to sweat, blood, dead bodies, fecal matter, urine, and other various sources, and they mixed together to be a "greeting" for Equiano who had never experienced anything like that before he was taken into slavery and put into the ship. He explains how he only wanted to die because of that.
The Chinese were addicted to the Opium.