B. helped prevent and cure diseases like tuberculosis and polio.
1. weakened Persian and Byzantine rule
2. effective fighting methods.
Washington D.C., Became the Capital. Where are the White House, the Capitol, and the Washington Monument? Just where they should be--in the capital of the United States. On July 16, 1790, Congress declared the city of Washington in the District of Columbia, the permanent capital of the United States.
Answer: i don’t speak spanish
Explanation:
for those reason. this is why i have no clue
