When Conducting an Investigation with Human Participants for Research or Commercial

Multiple Choice

When conducting an investigation with human participants for research or commercial reasons, which provision(s) for consent must be made?

A) approval of the research by a properly constituted ethics committee independent of the researchers.
B) participants informed they do not have to take part if they do not want to
C) participants fully informed of their right to withdraw from the investigation without consequences to them
D) all of the above.