问题

______ the farmers discovered theentrance to the secret cave in the valley—Totally by chance

A:Although he is a socialist
B:Evenif也表示让步,但其意为即使/即便;,强调“假设的、退一步的”情况
C:Beingasocialist是现在分词短语表示原因,相当于一个表示原因的状语从句,
D:Since he is a socialist
正确答案是: