Final answer:
Devin is advised to return home because she is in early labor and her cervix has not dilated.
Step-by-step explanation:
When a pregnant woman arrives at the birthing unit with signs of labor, the healthcare provider will perform a clinical examination to assess the progress of labor. In the case of Devin, she had been experiencing mild contractions but her cervix had not dilated and the mucus plug was still intact. This indicates that she is in early labor and it is not yet time to deliver the baby. Devin is advised to return home because active labor has not yet started.