In recruiting participants for a study about the experience of coping with a cancer diagnosis, the researcher tells people that the study is about their health beliefs. Which ethical right does this violate?

The right to full disclosure

Explanation:

Right to full disclosure  is the regulation in legal terms that makes organization or any person reveal every necessary and important information to other person or party before making them enter into the contract or any type of agreement.

Any major details that should be known to other person cannot be hidden before making people enter the contract otherwise it is falsely making people engage in contract.

According to the question,right to full disclosure  right is getting violated as participant do not share actual truth i.e.- cancer diagnosis coping experiment rather study on health belief is informed.  

the answer is d.index