Effective market researchers know that: Most data about most real estate are not related to a given site. Useful data, usually unavailable, must be…

11. Effective market researchers know that:

A.   Most data about most real estate are not related to a given site.

B.   Useful data, usually unavailable, must be approximated by using other data.

C.   Excluding irrelevant data helps isolate the useful data.

D.   All of the above.

E.   A and C only.