A 32-Year-Old Client Is Seeking Information About Various Birth Control

A 32-year-old client is seeking information about various birth control methods.The client has a history of deep vein thrombosis, and the health care provider has recommended that she use a contraceptive that does not contain estrogen.Which statement by the nurse best explains the relationship of estrogen to thromboembolic events?

A) "Estrogen causes several clotting factors to increase in the blood, which increases the chances of a blood clot occurring."
B) "Estrogen decreases the force of blood flowing through the blood vessels, which increases the chances of blood clot formation."
C) "Estrogen increases vascular vasoconstriction which restricts blood flow and increases the opportunity for blood clots to form."
D) "Estrogen causes the bone marrow to form more red blood cells, which can then increase the chance of blood cells clumping together and forming a clot."