**Core Concept**
The brachial plexus is a complex network of nerves originating from the spinal cord, providing motor and sensory innervation to the upper limb. A brachial plexus block is a regional anesthesia technique used to anesthetize the brachial plexus, providing analgesia or motor blockade to the upper limb. There are various approaches to brachial plexus block, each targeting different parts of the plexus.

**Why the Correct Answer is Right**
The **infraclavicular** approach of brachial plexus block targets the cords of the brachial plexus, which are formed by the union of the anterior and posterior divisions of the lower trunk. This approach is effective for providing anesthesia to the upper limb, particularly for procedures involving the shoulder and upper arm. The infraclavicular approach allows for the deposition of local anesthetic around the cords, resulting in a dense block of the brachial plexus.

**Why Each Wrong Option is Incorrect**
**Option A:** The **axillary** approach targets the terminal branches of the brachial plexus, specifically the musculocutaneous, median, and ulnar nerves, and is used for procedures involving the elbow and forearm.

**Option B:** The **suprascapular** approach targets the suprascapular nerve, which is a branch of the upper trunk of the brachial plexus, and is used for procedures involving the shoulder and scapula.

**Option C:** The **interscalene** approach targets the upper trunk of the brachial plexus, specifically the roots and trunks, and is used for procedures involving the shoulder and upper arm.

**Clinical Pearl / High-Yield Fact**
The infraclavicular approach is often used for procedures involving the shoulder and upper arm, such as shoulder arthroscopy or rotator cuff repair, as it provides a dense block of the brachial plexus.

**Correct Answer:** C. The infraclavicular approach targets the cords of the brachial plexus.