Which of the following was an argument by James Otis, Jr. against the Stamp Act?

A) He argued that the colonists should be heavily taxed to support the British Empire.
B) He believed the Stamp Act was necessary to maintain law and order in the colonies.
C) He argued that "taxation without representation" was unjust and violated colonial rights.
D) He believed that the Stamp Act was a fair and reasonable way to raise revenue.