from his purchased bags, randy counted 120 red candies out of 500 total candies. using a 90% confidence interval for the population proportion, what are the lower and upper limits of the interval? answer choices are rounded to the thousandths place. a.) lower limit: 0.209 upper limit 0.271 b.) lower limit: 0.209 upper limit: 0.265 c.) lower limit: 0.215 upper limit: 0.265 d.) lower limit: 0.215 upper limit: 0.271