Answer:Many powers belonging to the federal government are shared by state governments. Such powers are called concurrent powers. These include the power to tax, spend, and borrow money. State governments operate their own judicial systems, charter corporations, provide public education, and regulate property rights
Explanation:
Either a primary source could be unavailable or a primary source could be extremely biased. For example, if a researcher was looking at King George, they might not want to use the diary of someone who despised King George as a big part of their research.