Disordered eating is often
a. an eating disorder that affects numerous teens
b. caused by eating irregularly over short periods
c. a precursor for developing a disorder, but not a disorder on its own

Answer – B. (Caused by eating irregularly over short periods)
  Disordered eating is a mental disorder characterized by irregular eating habits that has a negative effect on a person's physical or mental health, It usually occurs as a result of severe distress or anxiety about body weight or shape.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

If this is a multiple choice give me the choices ! but id say  he always states the truth. unless its not a choice lol.-hope this : 3