The new apartments were much more desirable than the existing apartments. Rents in some areas close to Brewsterville dropped as a result of the construction of the new apartments . A sizeable number of people moved out of the existing apartments while the new apartments were being constructed. The new apartments were constructed at the outset of a trend of increasing numbers of people seeking residence in Brewsterville .
The construction of new apartments in Brewsterville increased the supply of available housing there. Ordinarily, increasing the supply of available housing leads to lower rents for existing apartments. But in Brewsterville, rents for existing apartments rose.
Which one of the following, if true, most helps to explain the discrepancy described above?