When the Centers for Disease Control (CDC) makes claims about the dangers of excess weight, they typically discuss those who are overweight and those...

When the Centers for Disease Control (CDC) makes claims about the dangers of excess weight, they typically discuss those who are overweight and those who are obese at the same time because 

Select one:

a. the two groups face very similar health risks.

b. it is very difficult to tell what the differences between the two groups are.

c. combining the two makes the problem seem larger.

d. they are under pressure from pharmaceutical companies to do so.