hAving provED his skill to himsElF, sAnDErs ______.
A．wAntED to livE A simplE liFE likE A CountrymAn
B．CAmE to rEAlizE thAt hE wAs rEAlly working For his CountrymEn
C．tAught himsElF liFE-sAving
D．wAs highly rEspECtED By thE olD DoCtor