When Attorneys, Accountants and Other Professionals Wear Expensive Clothing, It

When attorneys, accountants and other professionals wear expensive clothing, it:

A) only serves as a useful signal of ability if they already have well-established reputations.
B) does not serve as a credible signal of ability because anyone can wear nice clothes.
C) is a waste of money because professionals do not need to signal their ability.
D) can serve as a credible signal of ability.