Which of the following is TRUE regarding the informed consent?
A. Obtaining adequate informed consent from participants before exercise testing and participation in an exercise program is an important ethical but not legal consideration
B. The consent form should be verbally explained and include a statement indicating that the patient has been given an opportunity to ask questions about the procedure and has sufficient information to give informed consent
C. The consent form must indicate that the participant is not free to withdraw from the procedure at any time onces he signs the document
D. If the participant is a minor, a legal guardian or parent need not sign the consent form