once a person has been diagnosed with diabetes, what is the single greatest health threat they will face? a…

Brief Explanations:

People with diabetes are at a significantly higher risk of cardiovascular - related issues such as heart attacks, strokes, and high blood pressure due to factors like high blood sugar damaging blood vessels and nerves. Cardiovascular disease is a major and common complication for those with diabetes compared to the other options.

Answer:

B. cardiovascular disease