Vending machines on a college campus offer a variety of snacks. The purchasing agent believes that each type of snack is preferred in equal proportions by students and consequently orders equal quantities. The number of snacks sold from vending machines on this campus for the last six months is shown in the following table. Snack types Chips Candy bars Crackers Nuts Purchase frequency (o;) 159 198 174 149 The purchasing agent will use this information to perform a goodness-of-fit test at a 5% significance level. State the most appropriate hypotheses for the above test. A. Ho: All types of snacks are equally preferred among the students. HA: Not all types of snacks are equally preferred among the students. B. Ho: Not all types of snacks are equally preferred among the students. HA: All types of snacks are equally preferred among the students. C. Ho: The proportion of candy bars preferred by the students is greater than other types of snacks. HA: The proportion of candy bars preferred by the students is lesser than other types of snacks. D. Ho: The proportion of candy bars preferred by the students is lesser than other types of snacks. HA: The proportion of candy bars preferred by the students is greater than other types of snacks. Select one: O A O B O C O D What is the observed proportion for candy bars? A. 0.23 B. 0.25 C. 0.26 D. 0.29