By the book

選項說明:
A) 「買本書」的英文是：Buy a book
B) 「不正確」的英文是：That is incorrect
C) 「遵循規定」的英文是：By the book
D) 「參考」的英文是： Referencing

Explanation

做事 by the book 意思是百分百遵循公司政策、規定、或法律來辦事。

例句:
Next week is our annual audit. It's important that we do everything by the book.
下個禮拜是年度審計。我們一定要一切照規矩來。

正確答案是 C