In Which Way Does the Nurse Define Oncotic Pressure

In which way does the nurse define oncotic pressure?

A) A pressure reading within the inferior vena cava
B) A force that attempts to pull fluid from the interstitial and intracellular spaces
C) A force that attempts to push fluid out of the capillary pores into interstitial and intracellular spaces
D) A pressure reading upon inflation of the balloon on the tip of the Swan-Ganz catheter