Fear, fear of lawsuit maybe, they don't know what to do
If they are in immediate danger (such as in middle of highway with cars coming)
Not clear question type again
I think it is C, since it sounds the most reasonable.
Answer:
In the heart, the most abundant glucose transporters are GLUT1 and GLUT4. GLUT1 mainly localizes on plasma membrane, and is responsible for a significant component of basal cardiac glucose uptake.
They may lead to bad things in the future.