The Risk-Benefit Principle and the Precautionary Principle Draw the Line

The risk-benefit principle and the precautionary principle draw the line between acceptable and unacceptable risks by considering the risk's potential consequences. Kantian duty ethicists would argue that what matters is whether those exposed to the risk

A) have been properly informed about the risk, or could rationally wish that no information is required.
B) have given their informed consent to being exposed to the risk, or could reasonably be expected to do so if properly compensated.
C) have consented to being exposed to the risk, no matter how much or little information was presented to them.
D) will raise valid complaints about the risk.