During a contraction stress test, what should the nurse instruct the client?

Instructing the client to stimulate their nipples during a contraction stress test is appropriate because nipple stimulation can help induce contractions through the release of oxytocin. This is a common method during the test to assess how the fetus responds to contractions, which is critical in determining if there are any signs of fetal distress. By creating contractions, the test can monitor the baby's heart rate response during these times.

In this context, the other options describe processes or outcomes that are not relevant or accurate in relation to the contraction stress test. For instance, consuming glucose is related to a glucose tolerance test rather than a contraction stress test, while the concepts of positive or negative results are misrepresented in the other options and do not align with the specific focus of the contraction stress test, which seeks to identify fetal heart rate decelerations in response to induced contractions.