Sujay is conducting a research on a group of factory machinists as part of a study on workplace stress and heart disease. Before conducting his study, he explains the objective of the study to the subjects and tells them what they would need to do. He gives them the opportunity to choose if they want to participate or not. In other words, Sujay is seeking .

Informed consent

Explanation:

Informed consent is a permission that is granted in full knowledge of the possible consequences usually given to a doctor by a patient with knowledge of the possible risks and benefits on the procedure the doctor wants to carry out on the patients. In this case, Sujay seeks informed consent by telling them what they would need to do and giving them the opportunity to choose if they want to participate or not participate.

allowed for the prediction of the properties of missing elements.

b is the correct answer