Answer: C. To guarantee protections for all American Citizens
Explanation: First off, when the US constitution was introduced a lot of Anti-Federalist opposed the ratification of the 1787 U.S. Constitution because they feared the new national government would be too powerful and will eventually threaten their individual rights. So to help ensure the ratification of the constitution the founding fathers added the bill of right to guarantee protection for the citizens.
A, firearms. Whitney also invented the cotton gin earlier, but his work on interchangeable parts began with firearms
