Sentence 1: Adam was very overweight. 
 Sentence 3: He threw out all of his junk food 
 Sentence 4:  Adam started exercising every day 
 Sentence 5:  He lost 100 pounds in one year 
 Option 1: Adam went on a fad diet and lost a lot of weight but put it all back on. 
 Option 2: He decided to go on a diet.