What does it mean to come down on or keep down by unjust use of one's authority?

The phrase "come down on or keep down by unjust use of one's authority" refers to the act of exerting power or control over others in a way that is unfair or oppressive. When someone is said to oppress others, it means they are using their authority to restrict freedom, limit opportunities, or impose hardship on individuals or groups. Thus, the term describes a situation where people are held back or mistreated because of an abuse of power, which aligns perfectly with the concept of oppression. This can involve political, social, or economic dimensions where individuals are not allowed to express themselves freely or to achieve their potential due to external constraints imposed by those in authority. The other choices do not convey this meaning of unfair control; instead, they suggest support or promotion, which contrasts with the idea of subjugation inherent in oppression.