where作定语:Tell me where will u go?
where作同位语:the place where I met you,where作名词同位the place,I met u作定语从句修饰where
B,named for the New Mexico site where first discovered in 1932是个同位语结构,具体为:first discovered in 1932过去分词作定语修饰where,where作名词同位the New Mexicosite
错在不敢确定manufacture可以做一个动词(实际上是确实可以的)VS 不敢完全确定its making its factories是赘余的