Ezra made it an offical part
It could be either but mostly to help others it’s good to have good answers
A and B. They didn't want the state controlling the church, and only letting them do certain things. As it had in the earlier centuries.
Taxation. Shay's Rebellion happened because banks were foreclosing on farmers' homes. The farmers revolted because they couldn't make their payments <em>and </em><em />the high interest rates which was somehow caused by large post (Revolutionary) war debts. The federal government struggled to pay its debts because the Articles of Confederation didn't allow the federal gov't to <em>force</em> states to pay taxes.