A member of congress is curious how voters in two major political parties support a certain policy change. They obtained separate random samples of voters from each party. Here are the results:
Supports policy change? Democrat Republican
Yes


No


Total


They want to use these results to construct a

confidence interval to estimate the difference in the proportion of voters in these parties who support the policy change

. Assume that all of the conditions for inference have been met.
Which of the following is a correct

confidence interval based on these samples?