PLEASE HELP Which of the following lines from Call of the Wild best supports one of the central themes?

A. This man had saved his life; which was something; but, further he was the ideal master.

B. ...but his fighting spirit was arousedthe fighting spirit that soars above odds, fails to recognize the impossible, and is deaf to all save the clamor for battle.

C. the salient thing of this other seemed fair.

D. he saw, once for all, that he stood no chance against a man with a club