The two eastern counties suffered losses of NT$11.4 million to farms and local agriculture, while related facilities sustained damage _____ 18 million NT dollars.
(A) amounting to
(B) amounts to
(C) amounted to
(D) amount to

特例兩邊主詞不同的分詞構句一個農損一個設施，

所以不是WHICH關代用法....是While~~~damge (was) amounting to

原本題目:

The two eastern counties suffered losses of NT$11.4 million to farms and local ariculture, while related facilities sustained damage _____ 18 million NT dollars. (A) amounting to (B) amounts to (C) amounted to (D) amount to

修改成為

The two eastern counties suffered losses of NT$11.4 million to farms and local agriculture, while related facilities sustained damage _____ 18 million NT dollars. (A) amounting to (B) amounts to (C) amounted to (D) amount to

我的判斷是前面已經有sustained動詞了

刪去法刪BD  amount表主動+ing

The two eastern countries suffered losses of NT$11.4 million to farms and local agriculture, while related facilities sustained damage amounting to 18 million NT dollars.
譯：東部兩個國家的農場和當地農業損失新台幣1140萬元，相關設施損失新台幣1800萬元。