Sentence 1: Archie is allergic to dogs. 
 Sentence 3: To his surprise, he couldn't stop sneezing 
 Sentence 4:  Gary suspected dog dander was to blame for the sneezing 
 Sentence 5:  He was forced to replace all the carpets 
 Option 1: He moved into a new house. 
 Option 2: He moved into a new house with no carpets.