When a focus group deals with a potentially sensitive topic, which of the following statements about providing confidentiality to focus group participants is correct? -if group members know each other confidentiality is not an issue.-using pseudonyms in reports removes the concern about any confidences shared in the group.-the researcher cannot control what participants repeat about others outside the group.-if group participants sign confidentiality agreements, the researcher can guarantee confidentiality. the researcher cannot control what participants repeat about others outside the group