In country A, the vast majority (90%) of companies in the chemical industry are ISO 14001 certified. The ISO 14001 is an international standard for environmental management systems. An environmental group wished to estimate the percentage of country B's chemical companies that are ISO 14001 certified. Of the 500 chemical companies sampled, 350 are certified. a) What proportion of the sample reported being certified? b) Create a 99% confidence interval for the proportion of country B's chemical companies with ISO 14001 certification. (Be sure to check conditions.) Compare to the country A proportion. a) The sample proportion is (Type an integer or a decimal. Do not round.) b) What is the confidence interval? Select the correct choice below and, if necessary, fill in the answer boxes within your choice. OA. The 99% confidence interval is %, %). (Round to one decimal place as needed. Use ascending order.) OB. The conditions of a confidence interval are not satisfied. Compare to the country A proportion. Choose the correct answer below. OA. It appears that the proportion of companies certified in country B is less than in country A. OB. It appears that the proportion of companies certified in country B is about the same as in country A. C. It appears that the proportion of companies certified in country B is greater than in country A. OD. It is not possible to make a comparison because the conditions for creating a confidence interval are not statisfied.