Answer:
a) commonly agreed-upon professional accounting standards in the United States
Explanation:
According to the Generally Accepted Accounting Principles (GAAP) it consist of accounting principles, rules, procedures that are followed companies to companies so that there financial statements considered to be valid.
Here, in the given question the option A is correct as it is agreed for the professional accounting standard that shows the Generally Accepted Accounting Principles (GAAP)
Hence, the correct option is A.