Final answer:
All of the options listed in the question can be considered specific data except for the sales data for comparable properties.
Step-by-step explanation:
All of the options listed in the question can be considered specific data except for option D) The sales data for comparable properties. The employment opportunities in the area, the gross rent multipliers for the area, and the dimensions of the subject property are all specific data that can be measured and quantified. However, the sales data for comparable properties is more general and does not provide specific information about the subject property.