Sentence 1: Mr B was an elementary school teacher. 
 Sentence 3: One day, Mr B gave up 
 Sentence 4:  And he decided to let his students do whatever they wanted 
 Sentence 5:  But they felt strange because Mr B was so quiet 
 Option 1: But no matter how much he yelled, his students never behaved. 
 Option 2: He never yelled because his students are well behaved.