Final answer:
Proteinuria should be reported to the provider as it can signify preeclampsia, a serious pregnancy complication, while Braxton Hicks contractions, positive fetal movement, and fetal engagement are typical at 38 weeks of pregnancy.
Step-by-step explanation:
The subject of this question relates to prenatal assessment and appropriate interventions in the context of nursing and obstetrical care. When assessing a client who is 38 weeks pregnant, a finding that should be reported to the provider is C. Proteinuria. Proteinuria can indicate a potential complication, such as preeclampsia, which can threaten the health of both mother and baby. On the other hand, Braxton Hicks contractions and positive fetal movement are expected findings at this stage of pregnancy. Fetal engagement is also a normal finding as it indicates that the fetus is starting to descend into the mother's pelvis in preparation for labor. However, constant monitoring and assessment are vital during this stage to ensure the safety and well-being of both mother and fetus.