The F statistic calculated from a multiple regression analysis is equal to 6.89 and the p-value of the F statistic is 0.036. If so, then

a) all of the slope coefficients are significantly different from zero at the 95% confidence level.

b) The adjusted R2 value for this regression must be larger than its R2 value.

c) none of the slope coefficients is significantly different from zero at the 95% confidence level.

d) at least one of the slope coefficients is significantly different from zero at the 95% confidence level.