True he wanted to end slavery
Answer:
Hydraulic engineering is just a part of civil engineering. It is based on flow and conveyance of fluids, mainly water and sewage. It can be seen as an application of fluid mechanics for taking care of problems arising during storage, transport, regulation, measurement and use of water. This is needed while designing dams, canals, or cooling water facilities for thermal power plants.
The USA generally tried to remain neutral during the beginning of world War 1. therefore, i think the correct answer would be C, to remain military and politically neutral. hope this helps you