What is the main question i am trying to answer in the nhd project?

Align your research with the main topic.

Explanation:

Your theme should have some connections with the main theme that the competition organizers determine. For example, if you are interested in the development of technology throughout history and the topic is the Industrial Revolution in America, you can write about the reflection of the British Industrial Revolution in the US.

Getting some connections with the main topic at the start will greatly facilitate your research. The topic of research is many, and information is available to us everywhere. Search the Internet, books will certainly serve you. After you have thought about what to write, take the plunge and start designing your project.

the answer is mass marketing.

b) the confederacy had to pay all union war expenses.