A Researcher Has Used a One-Way Analysis of Variance Model $\alpha$

A researcher has used a one-way analysis of variance model to test whether the average starting salaries differ among the recent graduates from nursing,engineering,business and education disciplines.She has randomly selected four graduates from each of the four areas. Determine degrees of freedom treatment,degrees of freedom error and degrees of freedom total and state the critical value of the F statistic at $\alpha$ = .05

A) 4,12,16,3.26
B) 3,12,15,3.49
C) 3,12,15,3.24
D) 4,12,16,3.01