Answer:
In a group of city-states, each city-state is independent and rules by its own king. No central power controlled all of the city-states. In an empire, consisting of a nation and the city-states and nations it has conquered, one ruler is in control.
Explanation:
<span>The text identifies three categories of people who are good professional references: work colleagues, former employers, and </span>"former instructors or school advisers".
A professional reference means a suggestion from someone who can vouch for your capabilities and qualities for work. A professional reference for an accomplished worker is commonly a previous manager, a partner, a customer, a director, or another person who can prescribe you for business.
Sorry I can’t see them right
The answer is either a, b, or c, or s