When a community opens a large shopping mall, it often expects a boost to the local economy, and in fact a large amount of economic activity goes on in these malls. Yet the increase in the local economy is typically much smaller than the total amount of economic activity that goes on in the mall. Which one of the following, if true, most helps to explain the discrepancy described above? ['When large shopping malls are new they attract a lot of shoppers but once the novelty has worn off they usually attract fewer shoppers than does the traditional downtown shopping district.', 'Most of the jobs created by the construction of a large shopping mall are temporary, and most of the permanent jobs created are low paying.', 'Most of the money spent in a large shopping mall is spent by tourists who are drawn specifically by the mall and who would not have visited the community had that mall not been built.', 'Most of the money spent in a large shopping mall is money that would have been spent elsewhere in the same community had that mall not been built.']