What is the correct choice for question 16

Question 16 2.5 pts It is believed that the average grade on an English essay in a particular school system for females is higher than for males. A random sample of 55 females had a mean score of 81 with a standard deviation of three, and a random sample of 35 males had a mean score of 77 with a standard deviation of three. Indicate if the hypothesis test for the above problem is for one of the following. a. independent group means, population standard deviations, and/or variances known b. independent group means, population standard deviations, and/or variances unknown c. matched or paired samples d. single mean e. two proportions f. single proportion single proportion single mean two proportions matched or paired samples independent group means, population standard deviations, and/or variances unknown O independent group means, population standard deviations, and/or variances known