Answer: By making sure the identity of the peer reviewers is hidden
Explanation: Dr. Stewart can increase the likelihood of honest feedback if she can make sure the identity of the peer reviewers is hidden. If the identity of the peer reviewers are hidden, they would be free to give an honest review without adding any sentiments, they would be free to write down what they feel exactly about the new journal, but if their identity is not hidden, sentiments might influence the report if the peer reviewers.