A Study Examined the Link Between Sodium Intake and Blood

A study examined the link between sodium intake and blood pressure in children and adolescents between the ages of 8 and 18. The mean systolic blood pressure (SBP) was 112.8 mm Hg among the 636 study participants who were overweight or obese and consumed high levels of sodium, resulting in a 95% confidence interval for this group of 110.7 to 114.9 mm Hg. How would the margin of error for a 99% confidence interval based on the same 636 study participants compare?

A) It would have a smaller margin of error than the 95% confidence interval.
B) It would have the same margin of error than the 95% confidence interval.
C) It would have a larger margin of error than the 95% confidence interval.
D) It would likely change, but we cannot tell if it would have a smaller or a larger margin of error.