A survey about social media reported that 77% of B2B marketers (marketers that focus primarily on attracting businesses) plan to increase their use of social media, as compared to 55% of BC marketers (marketers that primarily target consumers). The survey was based on 1,335 B2B marketers and 1,690 B2C marketers. The accompanying table summarizes the results. Complete parts (a) through (d) below. Click the icon to view the contingency table about social media use and marketers. a. What is the probability that a randomly selected respondent plans to increase use of social media? (Round to three decimal places as needed.) b. What is the probability that a randomly selected respondent is a B2C marketer? (Round to three decimal places as needed.) c. What is the probability that a randomly selected respondent plans to increase use of social media or is a B2C marketer? (Round to three decimal places as needed.) d. Explain the difference in the results in (b) and (c). O A. The two events in part (c) are collectively exhaustive, while the event in part (b) is not. O B. The probability in part (b) is a marginal probability, while in part (c), the probability of an event or second event is calculated. O C. The probability in part (b) is a joint probability, while the event in part (c) is a simple probability. O D. The two events in part (c) are mutually exclusive, but part (b) has only one event.X Contingency table Increase Use of Business Focus Social Media? B2B B2C Total Yes 1,027 935 1,962 No 308 755 1,063 Total 1,335 1,690 3,025