Sentence 1: Donald felt like he had no privacy. 
 Sentence 3: He put a do not disturb sign on the door 
 Sentence 4:  Then his kids learned to knock first 
 Sentence 5:  Donald was relieved he could have some privacy now 
 Option 1: His kids were always barging in. 
 Option 2: His kids always scream and plays at his room.