A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=973 and x=598 who said "yes." Use a 90% confidence level.

a) Find the best point estimate of the population proportion (Round to three decimal places as needed.)

b) Identify the value of the margin of error E.(Round to three decimal places as needed.)

c) Construct the confidence interval. (Round to three decimal places as needed.)

d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.