A 23-Year-Old Woman, Who Was 8 Months Pregnant, Told Her

A 23-year-old woman, who was 8 months pregnant, told her obstetrician that she had recently noticed that her feet and ankles were swollen at the end of the day. She said that the swelling was worse if she had been standing for long periods. She also noticed that the veins around her ankles were becoming prominent.
-The symptoms and signs displayed by this patient can be explained by the following statements except which?

A) The enlarged uterus is an abdominal organ and often compresses the inferior vena cava.
B) Venous back pressure causes the tissue fluid to accumulate in the subcutaneous tissues of the feet and ankles.
C) Venous back pressure impairs the venous return in the superficial veins in both the legs, leading to varicose veins.
D) High levels of progesterone in the blood during pregnancy cause the smooth muscle in the wall of the veins to relax, thus permitting the veins to dilate.
E) The pregnant uterus presses on the sympathetic trunks, causing vasodilatation of the blood vessels of the legs.