What does the F ratio represent in the "ANOVA" table in an SPSS output for multiple regression?

Group of answer choices

a The ratio of how much the prediction of depression has improved by fitting the model, compared to how much variability there is in the outcome

b The ratio of how much error there is in the model, compared to how much variability there is in the outcome

c The ratio of how much the prediction of the outcome has improved by fitting the model, compared to how much variability there is in the outcome to begin with

d The ratio of how much the prediction of the outcome has improved by fitting the model, compared to how much error still remains