Read the following excerpt from a student essay. How can the writer best improve his or her sentence fluency?
A 2013 study by Arizona State University's W. P. Carey School of Business examined the relationship between customers and companies in the United States. According to the study, customer satisfaction remains low. Customer satisfaction levels are on par with those reported in the 1970s. One issue is that customers often have to wait a long time to speak to a company representative about their complaint. Even when they finally do manage talk to someone, they may get neither the desired results nor an apology.
A. by varying how sentences begin
B. by combining sentences that contain similar information
C. by using shorter sentences
Answer with the option's letter from the given choices directly.

B