Regarding the Interpretation of Quantitative Data in a Performance Evaluation

Regarding the interpretation of quantitative data in a performance evaluation:

A) Similar data (order size,call rate,sales,etc. ) gathered from the different territories may not be comparable.
B) Gross margin is a poor indicator of performance,especially if the company sells many products with quite different margins.
C) Market share performance is an exact basis for comparing several sales reps.
D) It is better to have a high average order size than to get a large number of orders.
E) A high batting average (orders - calls) is a good indicator of a well-balanced sales job.