​In common value auctions

A) ​Bidders do not know the value of the object being sold
B) Each bidder makes the same estimate of the value of the good
C) All bidders know the estimates of the others
D) ​The true value of the item differs across bidders

Why is it important for counselors to review the characteristics and demographics of the norm group when selecting a test for a client?

A) Failure to do so might offend the client
B) Failure to do so might result in invalid test results
C) Failure to do so might result in disapproval from a supervisor
D) It is uncommon for counselors to review this information when selecting a test