Step 1: Understanding the Concept:
An idiom relies on figurative language to convey an established cultural meaning. In the phrase "by the book," the word "book" serves as a symbolic metaphor for an official set of regulations, laws, a code of conduct, or a definitive manual of instructions. Doing something "by the book" means following those protocols exactly without any deviation.
Step 2: Detailed Explanation:
Let's analyze the figurative meaning and context of this idiom:
Historically, "the book" referred to legal statutes, religious texts, or strict official operational guides. When an employee, police officer, or judge operates "by the book," they refuse to take shortcuts or use personal discretion; instead, they adhere strictly to established policies and legal guidelines.
Let's evaluate the given options:
- Option (A) perfectly captures this meaning, as it describes someone acting strictly according to established laws or rules.
- Option (B) is a literal interpretation trap based on the physical act of reading.
- Option (C) is the opposite of the idiom's meaning; "by the book" implies a rigid, structured approach rather than a creative, unorthodox one.
- Option (D) describes the exact antonym of the expression.
Therefore, option (A) is the correct choice.
Step 3: Final Answer:
The correct meaning of the idiom is acting strictly according to rules, matching option (A).