What internal problems threaten the Qing dynasty

The internal problems threatened by the Qing dynasty were unmaintained irrigation systems and canals which lead to flooding. All of the sudden there was a drastic increase in population. The goals of the Chinese reformers was to modernize the civil service exams streamline government, and promote new industries.

Explanation:

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

the answer is a. harriet tubman was a nurse on the battlefield.