Sentence 1: Ed was falling behind in class. 
 Sentence 3: He resolved to study hard from now on 
 Sentence 4:  Every night he reviewed his lessons and texts 
 Sentence 5:  Luckily, Ed was able to graduate with his class 
 Option 1: If he failed he knew he would not graduate. 
 Option 2: Ed dropped out of school and got a job instead.