Common skills for self-aid are:

The correct choice encompasses a comprehensive approach to self-aid skills essential for divers. Each of the other options highlights specific techniques that divers should be familiar with in emergency situations.

Using alternate fin kicks and relieving leg cramps is vital for a diver's ability to maintain mobility and manage distress during a dive. This skill ensures that even if a diver experiences discomfort or fatigue, they can still navigate effectively to a point of safety.

Buoyancy control and emergency ascents are critical for managing one's position in the water column. Proper buoyancy control can help avoid rapid ascents or descents, which can lead to decompression sickness. Emergency ascents teach divers how to safely return to the surface when faced with an unexpected situation.

Switching to alternate air sources and regulator retrieval are essential for maintaining a diver's air supply in case of equipment failure or if a dive buddy requires assistance. Knowing how to locate and utilize spare air supplies can mean the difference between safety and a dangerous situation.

By stating 'All Answers are correct,' it highlights the importance of a well-rounded skill set in self-aid techniques, emphasizing that divers should be competent in multiple areas to effectively manage stress and emergencies underwater. Each skill contributes to a diver's ability to ensure their safety and