Caroline has constructed a multiple regression model and has conducted an f test of the model at a level of significance of 0.05. the model has four independent variables. the result of the f test was that the null hypothesis was rejected. select the appropriate conclusion that can be drawn:

at least one of the regression coefficients is non-zero
the dependent variable is not related to any of the independent variables
exactly one of the regression coefficients is non-zero
all of the regression coefficients are non-zero
all of the regression coefficients are zero