The main difference between bed and bulimia is

a) those who suffer from he disorder often keep it a secret
b) people who suffer from these disorders binge on a regular basis
c) only those who suffer from bulimia purge
d) only those who suffer from bed binge eat

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.