OG-12th-129

poorleafes

129. Cajuns speak a dialect brought to southern Louisiana
by the 4,000 Acadians who migrated there in 1755;
their language is basically seventeenth-century French
to which has been added English, Spanish, and Italian
words.
(A) to which has been added English, Spanish, and
Italian words
(B) added to which is English, Spanish, and Italian
words
(C) to which English, Spanish, and Italian words have
been added
(D) with English, Spanish, and Italian words having
been added to it
(E) and, in addition, English, Spanish, and Italian
words are added

想问一下  to which这种的用法，答案我选对的，C
这种结构应该怎么用（to which）
谢谢了~~