For whom did those who ratified the U.S. Constitution claim to speak, and on what authority did they make that claim? *

Answer:

The individuals who endorsed the US Constitution asserted that they represented the voices of their state's residents. They held this power as they were chosen by the populace as their delegates, based on their roles within the state or their active involvement in local policy matters.

Explanation:

The purpose of establishing the US Constitution was to enhance governance for the American citizens. Everyone engaged in the drafting and adoption of this constitution acted as representatives of their state's populace, carrying an obligation to advocate and make decisions on behalf of those individuals.

This authority was granted by the citizenry, and it was shared among the representatives based on their social standing and connection to the governing policies enacted within the community.