When You Find "Mixed" Results in Multiple Regression (I

When you find "mixed" results in multiple regression (i.e., some betas are significant, others are not) , you:

A) eliminate, or "trim," the insignificant variables.
B) adjust the insignificant variables by applying a standardized weight.
C) accept the null hypothesis.
D) choose the result that fits your hypothesis.
E) add other variables and run the test again.