Which of the Following Statements Is True

Which of the following statements is true?

A) If the confidence interval estimate for the regression slope coefficient crosses over zero,the average change in y for a one-unit change in x may be zero.
B) If the regression slope coefficient is very close to zero,this means that the relationship between the x ands y variable is statistically insignificant.
C) A statistically significant regression slope coefficient indicates that for a one-unit change in y there will be a positive change in x by an amount equal to the regression slope coefficient.
D) It is acceptable to make predictions for y using x values that are outside the range of the data that was used the in the regression.