Answer:
B.subtract 1 from the estimated coefficient, divide the difference by the standard error, and check if the resulting ratio is larger than 1.96.
Explanation:
Given that you wanted to test, using a 5% significance level, whether or not a specific slope coefficient is equal to one, then you should:
For 95% confi level Z critical =1.96
So we multiply the std error by 1.96 to get margin of error
Using confidence intervals we divided the slope difference by std error and check whether this absolute value is greater than 1.96
Hence option B is right
B.subtract 1 from the estimated coefficient, divide the difference by the standard error, and check if the resulting ratio is larger than 1.96.