What is one of the primary characteristics od perfectly competitive markets

The correct answer is: "many producers and all are price takers"

Perfect competitive markets are characterized by a large number of producers and each offer the same homogeneous product, this is why they have little bargaining power and they are all price-takers. Tthey cannot influence the market price at which the product is commercialized. They can only decide the amount that they will offer according to their price maximization strategies.

Markets of agricultural products are considered the best example of perfectly competitive markets in the real world.

the correct answer is "c: merchants" and "e. soldiers".

the song dynasty was known as the first government in the world to introduce paper currency. it was also the first chinese government which established a permanent standing navy. finally, the first compass was introduced during this period of government.

all of these innovations heavily affected commerce in a positive way. printed money dynamize commerce within the borders of the empire due to an easier way to quantify value during the trade. the introduction of the compass trade routes to be faster. finally, the introduction of a standing navy regulate trade routes.

regarding military affairs, gunpowder was created during this period. this was a tremendous improvement that was widely utilized by the military in order to innovate in the manufacturing of weapons.