According to the Textbook, with Respect to Prospecting Methods, Which

According to the textbook, with respect to prospecting methods, which of the following best summarizes the effectiveness of published sources such as directories and commercial lead lists?

A) Published sources such as directories and commercial lead lists are more expensive and therefore less efficient to use as a prospecting method than cold canvassing.
B) Since they are freely available to anyone, published sources are not very useful to salespeople as a method of locating prospects.
C) The increased popularity of the Internet has reduced the usefulness of published sources such as directories and commercial lead lists for prospecting.
D) Although accuracy can sometimes be a problem, published sources such as directories and commercial lead lists can provide salespeople with a wealth of information.