**Core Concept**
Flexible bronchoscopy is a medical procedure that allows for the visualization of the airways and lungs using a flexible tube with a camera and light on the end. This procedure is used to diagnose and treat various respiratory conditions, including lung cancer, infections, and bleeding.

**Why the Correct Answer is Right**
The advantage of flexible bronchoscopy lies in its ability to navigate through the airways and reach areas that are difficult to access with a rigid bronchoscope. This is particularly useful for sampling tissue or fluids from the distal airways, which can be crucial for diagnosing conditions such as tuberculosis or lung cancer. The flexible bronchoscope can also be used to perform interventions such as balloon dilation of strictures or removal of foreign bodies.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a particular advantage of flexible bronchoscopy, making it too vague to be correct.
**Option B:** This option is incorrect because it implies that flexible bronchoscopy is only used for diagnostic purposes, when in fact it can also be used for therapeutic interventions.
**Option C:** This option is incorrect because it mentions a disadvantage of flexible bronchoscopy, such as the risk of bleeding or perforation, which is not an advantage.

**Clinical Pearl / High-Yield Fact**
One important consideration when performing flexible bronchoscopy is the need for adequate sedation and analgesia to ensure patient comfort and safety. It is also essential to have a clear understanding of the airway anatomy and the potential risks and complications associated with the procedure.

**Correct Answer:** C. Ability to reach distal airways.