Answer:
The answer is: If group participants sign confidentiality agreements, the researcher can guarantee confidentiality.
Explanation:
Confidentiality is a very important issue regarding ethics in social research, the researcher must guarantee that the confidentiality of the participants will remain guarded. Although it is necessary that the researcher protects the identity of the participants, confidentiality goes beyond using pseudonyms, especially when other participants are involved, such as in focus groups. Therefore, group participants must sign confidentiality agreements, that way, the researcher can guarantee confidentiality.
The piont of initial perturbation. We need at lest three seismographic stations
