Answer:
The correct answer would be, Cost Constraint.
Explanation:
Cost Constraint is a concept of accounting, which states that the cost of providing information must be measured against the benefits attained or achieved from the use of the same information.
So in this question, If Spencer Realty decides not to conduct the survey, it would be the cost constraint that is restricting them to do it, as it is requiring a huge amount of 2.6 million dollars to do the survey and they know that the results derived from this survey would not differentiate potential business for them as compared to other realtor companies. So they can stop themselves just because of the cost constraint.