One method some companies are using to control health care costs is to

a. decline to provide health coverage for older workers
b. fire employees who refuse to quit smoking
c. charge obese people a higher percentage of health care premiums
d. hire only candidates with a low body mass index

C. charge obese people a higher percentage of health care premiums                        

Explanation:

            Obesity is a state of a person of having excess weight and have a large amount of fat in the body. Obese people are over weighted than their normal range when compared to their height.

            Obese people are more prone to diseases and health issues. Thus most of the companies as a measure to reduce their health care costs charges the obese employees in their companies with a higher percentage of the premiums of health care. Charging high premiums from the obese employees will help the companies to lower their health care cost which they provide to the employees as an allowance to them.

Hence the correct option is (c).

answer; i do believe that the employee must do the adjusting;

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.