1. French alliance with the Americans which combated the British fleet
2. Difficult for British to resupply/get reinforcements as they went farther from the coast
3. Nathaniel Greene (American General) wore British troops down leading to Yorktown
The answer is B. an increase in the power of the federal government over the United States.
My answer is D: Elected officials will likely pay more attention to messages that come from a group of people.
My reasoning for this is that government officials usually pay attention to a group of like-minded people with the same opinions or etc. on a specific topic especially if the said group has interests in supporting them. It also the only option that makes the most sense, logically speaking.
Hope this helps! :)