Answer:
Option B (Coercion)
Step-by-step explanation:
Under the Ethics of conducting any research, the participants who were to take part in any studies must partake under no influence and researcher must require informed consent from the participant and they must not under any circumstance coerce potential participants into agreeing to participate in studies because prospective research participants must understand that they will be participating in a study. Therefore any researcher who suggests to potential study participants that if they do not participate they will suffer negative consequences is putting prospective research participants undue influence which is a coercion method.