Final answer:
Trish should have provided Peta with informed consent prior to signing her up to participate in the clinical trial.
Step-by-step explanation:
Trish should have provided Peta with informed consent prior to signing her up to participate in the clinical trial. Informed consent involves providing all relevant information about the trial, including the potential risks and benefits, so that Peta can make an informed decision about whether or not to participate.
Learn more about Ethical considerations in clinical trials