What was the result of studies undertaken by the California Debris Commission, the permanent board established in 1893 to regulate hydraulic mining?

A-It failed to find a way hydraulic mining could be carried out without causing unreasonable environmental damage.

B-It did little to address ongoing questions posed by hydraulic mining practices.

C-It succeeded in finding ways to regulate hydraulic mining so that it could be carried out on a small scale with positive economic results.