Sentence 1: Rebecca realizes that she has gained weight. 
 Sentence 3: Rebecca finds her new diet very challenging 
 Sentence 4:  However, eventually she finds that she is losing weight 
 Sentence 5:  She is very happy that her diet is working 
 Option 1: She decides to go to the gym instead of changing her diet. 
 Option 2: She decides to stop eating carbohydrates.