You are planning to use a sample proportion to estimate a population proportion, p. A sample size of 100 and a confidence level of 95% yielded a margin of error of 0.025. Which of the following will result in a smaller margin of error? I: Increasing the sample size while keeping the same confidence level II: Decreasing the sample size while keeping the same confidence level III: Increasing the confidence level while keeping the same sample size IV: Decreasing the confidence level while keeping the same sample size