Sentence 1: Tom bought two ferrets from a friend. 
 Sentence 3: Tom took the ferrets home 
 Sentence 4:  The ferrets used the bathroom all over the house 
 Sentence 5:  Tom returned the ferrets to his friend 
 Option 1: Tom's friend told them they were housebroken. 
 Option 2: Tom's friend told him they were nice.