Final answer:
The main reason for the Regulators' rebellion in Springfield, Massachusetts in 1787 was Option 2: to protest high taxes imposed by their state government.
Step-by-step explanation:
The main reason for the Regulators' rebellion in Springfield, Massachusetts in 1787 was Option 2: To protest high taxes imposed by their state government.
The rebellion was led by Daniel Shays, a Revolutionary War veteran, and was fueled by grievances such as unfair taxation between the poor and wealthy classes, a shortage of cash money, and the non-acceptance of farm goods as payment for debts and taxes.
The farmers felt that the state government officials were being paid high salaries while they struggled financially. The rebellion escalated to the point of an insurrection and the rebels attempted to seize the federal armory in Springfield. However, the state's loyal forces defeated them, and the rebellion was eventually crushed.