Which of the following is part of the ethical guidelines for research with human participants? 1. No identifying information may be collected from the participants during the study. 2. Participants...

Which of the following is part of the ethical guidelines for research with human participants?

1. No identifying information may be collected from the participants during the study.

2. Participants can withdraw from the study at any point before the study begins, but not after that point.

3. Participants must be informed about the study’s procedures before they are asked to give consent for their participation.

4. All of the above.