State the conclusion based on the results of the test. According to the report, the mean monthly cell phone bill was $48.81 three years ago. A researcher suspects that the mean monthly cell phone bill is higher today. The null hypothesis is not rejected. Choose the correct answer below. O A. There is not sufficient evidence to conclude that the mean monthly cell phone bill is higher than its level three years ago of $48.81. O B. There is sufficient evidence to conclude that the mean monthly cell phone bill is higher than its level three years ago of $48.81. O C. There is sufficient evidence to conclude that the mean monthly cell phone bill is less than its level three years ago of $48.81.(c) Write a conclusion for this hypothesis test assuming an a = 0.10 level of significance. O A. Reject the null hypothesis. There is not sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. O B. Reject the null hypothesis. There is sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. O C. Do not reject the null hypothesis. There is sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. O D. Do not reject the null hypothesis. There is not sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today