population proportion, what is the 95% confidence interval estimating the proportion of businesses who believe it is harder to run a business now than 5 years ago?     a) (0.53318 , 0.60798)     b) (-0.53318 , 0.60798)     c) (0.5515 , 0.58966)     d) (0.54919 , 0.59196)     e) (0.39202 , 0.46682)

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