The battering waves

Hello folks.

He went to the rocky & cliff- like shore.

A. He sat there for a while; watching battering waves, and crying over his wretched life.

B. He sat there for a while; watched battering waves crashing on the rocks, and cried over his wretched life.

C. He sat down there and spent a while; watching battering waves, and crying over his wretched life.

Which one is more meaningful and grammatical correct?