Which of the following is true of the various elements of the multi-factor index method of estimating area market potentials?

A) Zip+4 code centers generally have stable boundaries and a population of about 4000.
B) The weights in the buying-power index are somewhat arbitrary.
C) Normally, the lower the BDI, the less room there is to grow the brand.
D) Census tracts are a little larger than neighborhoods.
E) This method is primarily used by business marketers.

B