A teacher finds that final grades in a class are historically distributed as: A, 25%; B, 25%; C, 40%; D, 5%; F, 5%. At the end of a randomly selected semester with n=160 students, 42 received an A, 36 received a B, 60 received a C, 8 received D and 14 received and F. What test is appropriate to test the hypothesis that the distribution has changed?

a. Chi-Square Test of Independence

b. Chi-Square Goodness of Fit

c. Analysis of Variance (ANOVA)

d. Hypothesis test of two population proportions