All of the following are important reasons to include direct quotations in your writing except a. to add powerful emphasis to your ideas. b. to add length to short, boring essays. c. to add strong support to your claims. d. to add important credibility to the piece

To include direct quotations means that u want to emphasize on the importance of your writing and support your ideas and claims
so All of the following are important reasons to include direct quotations in your writing except 
to add length to short, boring essays
so correct answer is B 
hope it helps