Final answer:
The degree of glycemic control during pregnancy is the most crucial factor in reducing pregnancy and diabetes-associated complications.
Step-by-step explanation:
The factor identified as being most important in helping to reduce maternal/fetal/neonatal complications associated with pregnancy and diabetes is B) Degree of glycemic control achieved during the pregnancy. Proper glycemic control helps prevent the risk of complications to both the mother and fetus, which includes potential birth defects, the mother's susceptibility to infections, and the risk of gestational diabetes. Achieving stable blood glucose levels during pregnancy is crucial in minimizing the risk of complications and ensuring the health of both mother and child.