Why Is Canada's Poor Still Less Healthy Than Individuals from the Middle

Why is Canada's poor still less healthy than individuals from the middle and upper classes?

A) Medical care cannot compensate for other disadvantages of poverty,such as poor housing or inadequate diet.
B) The poor have longer life spans,so they naturally fall victim to many more illnesses than the middle and upper classes.
C) The poor suffer less stress,and as a result do not go to doctors as often.
D) The poor choose not to use preventive strategies,despite being more informed about them than the middle and upper classes.