What is a possible parameter of interest? A. the proportion of bank institutions in the region that have banking B. the proportion of bank in the region who were sampled C. the proportion of bank institutions in the region that cite banking enhancements as the greatest anticipated strategy D. the proportion of bank representing bank institutions that cite banking enhancements as the greatest anticipated strategy Part 4 d. What is the statistic used to estimate the parameter found in (c)? Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. enter your response here% of all bank institutions in the study use banking B. enter your response here% of bank representing bank institutions earn more than $500,000 per year C. enter your response here% of all bank were sampled in the study D. enter your response here% of representing bank institutions in the study cite banking enhancements as the greatest anticipated strategy