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A study asked respondents, "If ever married, how old were you when you first married?" The results are summarized in the technology excerpt that follows. Complete parts (a) through (d) below. One-Sample T: AGEWED Variable N Mean StDev SE Mean 99.0% CI AGEWED 26120 23.440 4.657 0.029 (23.366, 23.514) Click the icon to view the table of critical t-values. (a) Use the summary to determine the point estimate of the population mean and margin of error for the confidence interval. x= (Type an integer or a decimal. Do not round.) E =(Type an integer or a decimal. Do not round.) (b) Interpret the confidence interval. O A. There is a 99% probability that the mean age of people when first married is 23.440 years. O B. One can be 99% confident that the mean age of people when first married is between 23.366 and 23.514 years. O C. There is a 99% probability that the mean age of people when first married is between 23.366 and 23.514 years. O D. One can be 99% confident that the mean age of people when first married is 23.440 years. (c) Verify the results by computing a 99% confidence interval with the information provided. Begin with the lower bound. 4.657Next find the upper bound. 4.657 (Round to three decimal places as needed.) (d) Why is the margin of error for this confidence interval so small? O A. The standard deviation is very small. O B. The standard deviation is very large. O C. The sample size used is very large. O D. The mean is very small