Early studies of brain tissue that used staining techniques and microscopes from the 19th century described the "nerve net." These early understandings were in error in the sense that the nerve net was believed to be:

Continuous

Explanation:

A nerve net is any plexus of neurons lying in the periphery and so connected as to provide a diffuse conduction system, i.e., one in which conduction can take place in any direction and in which many alternative routes exist between any two points. They are entirely distinct and nowhere structurally continuous with any other fiber.

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.

d will be ur answer

to mark sum 1 brainliest there has to be 2 answer at least