A feed supply company has developed a special feed supplement to see if it will promote weight gain in livestock. Their researchers report that the 77 cows studied gained an average of 56 pounds and that a 95% confidence interval for the mean weight gain this supplement produces has a margin of error of ± 11 pounds. Five staff members from the marketing department were chosen to interpret the results. Answer parts (a) through (e). (a) The interpretation by the first staff member was that 95% of the cows studied gained between 45 and 67 pounds. Is this interpretation correct? Explain any misinterpretation OA. The interpretation is correct OB. The interpretation is not correct. The confidence interval addresses the mean weight gain of the population of all cows, not 95% of the cows in the study OC. The interpretation is not correct. The confidence interval indicates that the sample of cows attained 95% of the desired weight gain.