The correct responses regarding why colonists opposed the Stamp Act are:
- They said that they were being taxed without being represented.
- They thought that the stamp taxes were expensive and inconvenient.
The other two options do not accurately reflect the reasons for the colonists' opposition to the Stamp Act. They were primarily focused on the principle of "no taxation without representation" and the burden of the tax itself, rather than advocating for additional taxes or broader applications of the Stamp Act.