Step 1: Understanding the term "bold."
The word "bold" refers to someone who is brave, fearless, or courageous. It is commonly used to describe a person who displays courage or willingness to take risks.
Step 2: Analyzing the options.
- **Courageous** means brave or fearless, which is a perfect synonym for "bold."
- **Obedient** means willing to comply with authority, which is not related to "bold."
- **Impertinent** refers to being rude or disrespectful, which is unrelated to "bold."
- **Cruel** refers to being harmful or mean, which is the opposite of bold.
Step 3: Conclusion.
The correct synonym for "bold" is **courageous**.
Final Answer: \[ \boxed{\text{The correct answer is (A) courageous.}} \]