Questions: The Whiskey Rebellion was a protest by grain farmers against the excise tax on whisky. was led by tavern keepers on the frontier. was led by slaves who thought their daily ratio of whisky insufficient. was led by Federalist merchants who sold imported whiskey.

The answer is A: the original text in the question states that the Whiskey Rebellion was a protest by grain farmers against the excise tax on whisky.

Explanation for each option:

A. The Whiskey Rebellion was a protest by grain farmers against the excise tax on whisky. - This is correct. The Whiskey Rebellion occurred in the early 1790s when grain farmers in western Pennsylvania protested against a federal excise tax on whiskey. The tax was part of Treasury Secretary Alexander Hamilton's plan to centralize and fund the national debt, but it was unpopular among farmers who used surplus grain to produce whiskey.

B. The Whiskey Rebellion was led by tavern keepers on the frontier. - This is incorrect. While tavern keepers might have been affected by the tax, the rebellion was primarily led by grain farmers who were directly impacted by the excise tax on the whiskey they produced.

C. The Whiskey Rebellion was led by slaves who thought their daily ratio of whisky insufficient. - This is incorrect. The rebellion was not led by slaves, nor was it related to any issues concerning the daily ration of whiskey for slaves.

D. The Whiskey Rebellion was led by Federalist merchants who sold imported whiskey. - This is incorrect. The Federalists, led by Alexander Hamilton, were actually the ones who imposed the tax. The rebellion was against the Federalist government's policy, not led by Federalist merchants.