Wondering which option is making the column chart misleading?

Skylar Diggins is reviewing the performance of four call centers under her management. Twelve observations of the amount of time it took to process refund requests have been collected from each of the four call centers. Based on these observations, the following column chart displays the average service time of each call center. Average Time to Process Refund Requests Draraccina Tima (minutac) (a) Why may the interpretation of the average service time from this column chart be misleading? 1. The columns are too far apart to be able to make comparisons between their heights. 2. The columns are too wide which makes the differences in the bars look larger than they are. 3. The axis labels are insufficient for an observer to understand what the axes represent. 4. The display of these sample means does not show the uncertainty in these estimates. 5. Using the same color for each column may make the heights of the columns seem more similar than they really are. (b) How can this chart be improved to provide a more accurate comparison of the average service times at the call centers? 1. More detail should be added to the axis labels. 2. Different colors should be used for every column to make the columns more distinct. 3. The display of a confidence interval for each mean using error bars would convey the uncertainty in the sample means. 4. The columns should be made narrower to make the comparisons more realistic. 5. The columns should be moved closer together. Skylar Diggins is reviewing the performance of four call centers under her management. Twelve observations of the amount of time it took to process refund requests have been collected from each of the four call centers. Based on these observations, the following column chart displays the average service time of each call center. Average Time to Process Refund Requests Draraccina Tima (minutac) (a) Why may the interpretation of the average service time from this column chart be misleading? 1. The columns are too far apart to be able to make comparisons between their heights. 2. The columns are too wide which makes the differences in the bars look larger than they are. 3. The axis labels are insufficient for an observer to understand what the axes represent. 4. The display of these sample means does not show the uncertainty in these estimates. 5. Using the same color for each column may make the heights of the columns seem more similar than they really are. (b) How can this chart be improved to provide a more accurate comparison of the average service times at the call centers? 1. More detail should be added to the axis labels. 2. Different colors should be used for every column to make the columns more distinct. 3. The display of a confidence interval for each mean using error bars would convey the uncertainty in the sample means. 4. The columns should be made narrower to make the comparisons more realistic. 5. The columns should be moved closer together