Final answer:
No specific training is required to use an AED since they are designed to be used by anyone, including laypersons, and provide verbal instructions. However, BLS certification can be beneficial for providing CPR in conjunction with AED use.
Step-by-step explanation:
The type of training required to operate an Automated External Defibrillator (AED) is generally a basic life support (BLS) certification, which includes training in CPR (cardiopulmonary resuscitation) and use of an AED. However, AEDs are designed to be used by laypersons, and in many cases, no formal certification (option C: None) is required to use an AED. The devices are often found in public places and provide verbal instructions for use. They are equipped with technology to automatically diagnose the patient's heart condition and apply the shock with appropriate energy and waveform. While BLS certification is beneficial, especially for understanding when and how to correctly perform CPR before using an AED, it is not a legal requirement for AED use.