12. Protesters argued that the contractors tasked with caring for children weren't qualified for the job, and _____ they shouldn't be allowed to continue their practice.
(A) which
(B) it
(C) that
(D) for

?句子分析：

Protesters argued that the contractors tasked with caring for children weren't qualified for the job, and _____ they shouldn't be allowed to continue their practice.

主幹結構是：

• Protesters argued that ...,

• and (argued) that ...

? 「and」後面的子句與前面的 argued that 子句 平行。

✳️語意：

「抗議者主張那些負責照顧兒童的承包商不具備資格，並且（主張）他們不應被允許繼續執業。」

因此第二個子句也應該接在 argued that 後面，省略重複的動詞 argued，只留下連接詞 that。

?文法結構說明：

在英文裡，如果有兩個「that 子句」共用一個動詞（如 argue, say, think 等），第二個子句前的 that 仍需保留以保持句意清楚：

✅ Protesters argued that A, and that B.
❌ Protesters argued that A, and B.（不完整或歧義）

?其他選項錯誤原因：

• (A) which → 代名詞，不能連接完整子句。

• (B) it → 代名詞，語意不通。

• (D) for → 介系詞，後面不能接完整子句。

✅ 正確答案： (C) that

?完整句子：

Protesters argued that the contractors tasked with caring for children weren't qualified for the job, and that they shouldn't be allowed to continue their practice.

?️翻譯：
抗議者主張，那些負責照顧兒童的承包商不具備資格，因此不應被允許繼續執業。