A community health nurse is providing teaching to a client who is being enrolled in a randomized controlled trial. Which of the following statements by the client indicates an understanding of the teaching?

"I will not know if I am going to be in the intervention or control group."

"The study will last for 10 years. You will contact me annually for an interview and blood work."

"You'll need to find other participants like me but who do not have this disease."

"The survey will take an hour to complete and then I'll be done."