Final answer:
The correct statement indicating adequate patient education is the one that shows patients are informed about the risks and benefits, and can give informed consent.
Step-by-step explanation:
The statement indicating that adequate patient education has taken place is one that reflects the patient's understanding of the procedure or treatment, along with its risks and benefits. So the correct choice is: 'All risks and benefits must be clearly outlined. Study participants must be informed of relevant aspects of the study in order to give appropriate consent.' This suggests that the education provided was enough for the patient to make an informed decision about their care, which is a critical component of effective patient education.