Which of the Following Does Not Contribute to Venous Return

Multiple Choice

Which of the following does not contribute to venous return?

A) The difference of pressure between venules and the venae cavae
B) The expansion and contraction of the thoracic cavity during ventilation
C) The suction created by the atria slightly expanding during ventricular systole
D) Widespread vasodilation
E) Contraction of skeletal muscles of the limbs