Some of the old-timers felt that the ghost belonged to an old miner. The old miner had disappeared years ago. 

A. Some of the old-timers felt that the ghost belonged to an old miner who  had disappeared years ago. 

B. Some of the old-timers felt that the ghost belonged to an old miner that had disappeared years ago.

C. Some of the old-timers felt that the ghost belonged to an old miner ,and  had disappeared years ago.

D. Some of the old-timers felt that the ghost belonged to an old miner : while the old miner had disappeared years ago.