Standard Heparin Is Preferred for Pregnant Patients Needing an Anticoagulant

Standard heparin is preferred for pregnant patients needing an anticoagulant because:

A) Molecular size will allow it to cross the placenta to help the offspring.
B) The offspring will receive the full anticoagulant effect.
C) Molecular size will not allow it to cross the placenta to affect the offspring.
D) The offspring will receive only a partial anticoagulant effect.