A directs B, his solicitor, to sell his estate by auction and so employ an auctioneer for the purpose. B names C, an auctioneer to conduct the sale.

A. C is a sub agent, and A's sub agent for the conduct to the sale

B. C is not sub-agent, but B's agent for the conduct for the sale

C. C is not a sub-agent, but A's agent for the conduct of the sale

D. None of the above

Answer: Option C