Answer:
The examples of unethical breaches to a participant's right to privacy are:
- Using a consenting participant's name after a focus group is finished
- Sending unsolicited emails to participants on their birthdays
- Deleting participants' personal information without permission
The fourth option, making a product from a study available to participants to purchase, is not necessarily a breach of privacy, but it could be a breach of confidentiality if the study data was not anonymized and the participants' personal information was used to create the product.