PHENOMENON: the quality of the original carpentry work of hotels built before 1930 is generally superior to that in hotels built afterward. REASON: Clearly carpenters working on hotels before 1930 typically worked with more skill, care, and effort than carpenters who have worked on hotels built subsequently. D: The better the quality of original carpentry in a building, the less likely that building is to fall into disuse and be demolished. D provides an alternative reason, not because skills of carpenters were different, but because the hotels with poor quality simply don't exist anymore. Thus, weaken. |