A business plan is usually necessary for an entrepreneur to obtain financing plan, his or her day, manufacture a new product. Therefore, all of the above.
The correct answer is option C: someone diagnosed with smallpox.
The person that would have been most grateful for the work of 19th-century scientist Edward Jenner, would be someone diagnosed with smallpox because Jenner was who discovered the first vaccine against the smallpox virus. Moreover, this disease that was widely spread in the 18th century and killed many people.
The state governments may vary in amount of power shared with the central government.