In what way do the state's aid the national government

The states help the national government with their distribution of funds, evaluation of power, and in making congressional decisions.

Explanation:

With the census, a state helps the government figure out how much money a state needs to support its population based on the demographics within its state boundaries. Also, if states do not like how the government is being operated, states have the power to input how the government could improve by the use of bills (earliest form of laws) and protests. States have representation in Congress otherwise known as "delegates" who help decide on Supreme Court cases and pass/deny a law that may be unconstitutional so government cannot abuse their power.

c. troops marched forward in close formation against newer, more accurate weapons

the answer is c. your welcome.