SAT OG 里语法题求助

题目

SAT OG 里语法题求助
the tribal council`s program familiarized young people with cherokee history,(taught them)B tribal traditions,and (they had)C the (opportunity to)D learn skills used by ancient artists.E
这题我选的是B,因为我觉得这里主语是program而不是人,没办法taught them traditions.可是为什么答案是C啊,

答案

答案是C因为是满足平行结构,即：familiarized young people,taught them tribal traditions,and gave them theopportunity to.三个动词平行.
主语是program没错,但是program是可以taught them 的.意思是这样一个项目.