Who is the "they" referred to in the following quotation?

They also established a number system based on six, dividing the hour into 60 minutes and the circle into 360 degrees, as we still do today.

A. the Akkadians
B. the Sumerians
C. the Babylonians
D. the Assyrians

C, Babylonians.

(That's the answer.)

To identify the "they" referred to in the quotation, we can look for clues in the statement itself. The quotation mentions that "they" established a number system based on six, dividing the hour into 60 minutes, and the circle into 360 degrees.

To determine who "they" could be, we can eliminate options based on historical knowledge. The Akkadians, Sumerians, Babylonians, and Assyrians were all ancient civilizations that made significant contributions in various fields, including mathematics.

Considering the information in the quotation, the Sumerians are most closely associated with the development of a number system based on six. The Sumerians are known for their advanced knowledge in mathematics and their use of a sexagesimal (base-60) numerical system.

Therefore, the correct answer is B. the Sumerians.