Answer:
D article
Explanation:
It is a source based off of the time period while others are not.
Assume that there is no way to pre-vent some-one from using an inter-state highway, regard-less of whether or not she helps pay for it. This characteristic is associated with : <u>nonexcludability</u>.
Nonexcludability ent-ails the free-rider prob-lem because a person can enjoy the bene-fits of the good without hav-ing to pay for it. Nonexcludability means that the cost of keep-ing non-payers from enjoying the bene-fits of the good or service is prohibitive.
Non-excludable means that it is costly or im-possible for one user to exclude others from usi-ng a good. Non rival-rous means that when one per-son uses a good, it does not pre-vent others from using it.
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The answer is C. The depopulation of the Americas, the overall effect was a decreased population growth worldwide.
Americans had never had diseases like smallpox, measles, whooping cough, among others, for that reason, they did not have defenses against them, when there was the interchange with the Europeans, there were a lot of deaths, which caused a big decreased in the population and in world general, because native people could not fight with those diseases.
A long-lasting filament.
Option: C
<u>Explanation:
</u>
Thomas Edison wasn't the one who invented the bulb; rather he was the one whose mind enhanced the previous inventions on the light bulb and converted into the electric bulb officially. In 1878, he filed a patent application on improving the electric lights. He took a thin filament that possessed high electric resistance and created incandescent lamps which were long-lasting. After experimenting with many filament i.e., carbon and platinum, he concluded using the carbon filament in the lamp which lasted for around 13.5 hours.
Herjólfsson later sold his ships to Ericson, who sailed west intentionally and was not blown off course trying to reach Greenland after meeting King Olaf, as in the Saga of Eric the Red. With wood being in very short supply in Greenland, the settlers there were eager to explore the riches of this new land. Ericson explored this coast and eventually established a short-lived colony in what he called Vinland.