Proc Reg does not test the type 1 and type II sums of squares for the usual multiple regression. In most cases this test is not needed for which one of the following reasons?

a) because the test of sum of squares do not provide a meaningful tests.

b) because only the test of the overall model is needed to interpet the variables

c) because the t-tests of the regression coefficient are equivalent to the test of the type II SS

c) because the t-tests of the regression coefficient are equivalent to the test of the type I SS