The answer for your question is C lack of food and water and B disease
It was the war that gave birth to modern warfare, introducing machine guns, artillery, and chemical weapons. With new technology, came the need for new tactics and old generals didn't do that, which led to the meat grinder of trench warfare.
Answer:
D-He used fear of communism to make himself stand out.
I would make a law where anyone can come over to the United States and stay, regardless of their legal status. Open borders, where anyone, from anywhere, can, in exchange for providing ID, a customs/smuggling/invasive species check of their belongings, and maybe a health check, they get in. Once in, a separate but similarly simple process to get a green card. Following a suitable period of residency, say, 5-10 years, citezinship (if they want it). It would be suitable for this law to fall under the Legislative Branch, as it makes all laws (including laws relating to immigration), declares war, regulates interstate and foerign commerce, and controls taxing and spending policies.
Explanation:
Steamboats positively affected the world because they made the transportation of goods more efficient and economical. Travel time was cut in half and was a compliment of the railroads, both for commercial and passenger transportation. Steamboats were independent of the wind speed and direction.
