Final answer:
In the latent phase of labor, the nurse should respond to complaints of constant cramping pain by offering comfort measures such as taking off the monitor belts and helping the patient get into a more comfortable position.
Step-by-step explanation:
In the latent phase of labor, the contractions are typically uncoordinated and of low intensity. If a laboring patient complains of constant cramping pain during this phase, the nurse should respond by providing comfort measures. Option c is the most appropriate response, as it offers to take off the monitor belts and help the patient get into a more comfortable position. This can help alleviate the discomfort associated with the contractions.