The response that best examines the main effects of the Circuit Court Act of 1769 is:
"The Act divided South Carolina into seven judicial districts, each with its own courthouse, jails, judges, and local Regulators to keep the peace."
This option accurately reflects the intent and impact of the Act, which was designed to improve the administration of justice and make the legal system more accessible to the residents of South Carolina by creating distinct judicial districts rather than consolidating everything in one location, such as Charles Town.