It is generally believed that there are 7 days in a week because
A) there are 7 stars in the Big Dipper.
B) it is necessary to have 52 weeks in a year.
C) there are 7 visible bodies in the sky that move against the background of the fixed stars.
D) it is easy to multiply by 7.

Question

Quizplus · Accepted Answer

The seven-day week is thought to originate from ancient astronomy, where the seven visible celestial bodies — the Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn — were associated with gods and the days of the week were named in their honor. This tradition was adopted and spread by various cultures, including the Babylonians and Romans.

It Is Generally Believed That There Are 7 Days in a Week