What is the best way of revising the following passive voice sentence to active voice?

if anything is discovered, and the miner wishes to locate a claim, he must visit the recorder's office.

question 12 options:

a: if the miner discovered anything and wished to locate a claim, he visited the recorder's office.

b: if anything discovers the miner, and he wishes to locate a claim, he visits the recorder's office.

c: if the miner discovers anything and wishes to locate a claim, he must visit the recorder's office.

d: if anything is discovered by the miner, and he wishes to locate a claim, he must visit the recorder's office.