Which One of the Following Changes in the Blood Pressure

Which one of the following changes in the blood pressure of pregnant women should the nurse be aware of in order to educate the patient?

A) A blood pressure cuff that is too small produces a reading that is too low; a cuff that is too large produces a reading that is too high.
B) Shifting the patient's position and changing from arm to arm for different measurements produces the most accurate composite blood pressure reading.
C) The systolic blood pressure increases slightly as pregnancy advances; the diastolic pressure remains constant.
D) Compression of the iliac veins and inferior vena cava by the uterus contributes to hemorrhoids in the later stage of term pregnancy.