Answer:
Vaccines
Explanation:
It is not known if it was a Chinese or Indian discovery but it was not popularized before the use in 1796. In 1796 Edward Jenner inoculated a boy in England and that prevented him from getting smallpox. This was later used as the groundwork for developing vaccines and today's vaccine culture and mass immunization would not be possible without Jenner and his experiments.
Answer:
Westward expansion refers to the movement of settlers into the West of America around the nineteenth century. (From what I remember), it began with the Louisiana Purchase (basically the purchase of the state of Louisiana) and was intensified by the Gold Rush, the Oregon Trail as well as a belief in Manifest Destiny.
In conclusion, Westward expansion provided the United States with many natural resources and ports along the Atlantic, Pacific and Gulf coasts which allowed the expansion of trade. They also play key elements in creating the strength of America today.
<span>"The church was able to function without persecution from the government."</span>
The best answer choice in this situation is D because Texas was previously owned by Mexico but then Texas took it
D is the answer
I believe the answer is: It caused the Roman empire to have a small and weak army.
By enforcing conscription, the majority of Roman soldiers were brought out to aid in the conquest to expand the Roman empire. When this happen, the defense for within the Capital become extremely weak and fragile. This make it easier for the invaders to attack and destroy the capital.