19. Sam is thinking about switching cell phone providers. Sam is particularly interested in making sure that he has good signal strength when he is at work. He asks each of his 30 coworkers what cell phone provider they use and if they have poor signal strength, moderate signal strength, or good signal strength at work. Here is a segmented bar chart of the results.
Which of the following statements is supported by the data?
(A) All three providers are equally good choices because all three bars extend to 1, or 100%.
(B) Over 50% of his coworkers do not have cell service while at work.
(C) Provider B has much better signal strength than Provider A at his workplace.
(D) Provider A has reports of the greatest signal strength.
(E) Provider C has reports of the greatest strength of service.