A report claims that the returns for the investment portfolios with a single stock have a standard deviation of 0.52, while the returns for portfolios with 33 stocks have a standard deviation of 0.319. Explain how the standard deviation measures the risk in these two types of portfolios. Choose the correct answer below. O A They both have the same risk because the difference in the standard deviation is too small. OB. A lower standard deviation means less certainty in the return and more risk. Hence, the returns for portfolios with 33 stocks have more risk than the ones with a single stock Oc Compare the ratio of the standard deviation to the number of stocks for each type of portfolio If the ratio is smaller than the risk is higher. Hence, the returns for portfolios with 33 stocks have loss risk than the ones with a single stock OD. Compare the ratio of the standard deviation to the number of stocks for each type of portfold. If the ratio is smaller, than the risk is higher. Hence, the returns for portfolios with 33 stocks have more risk than the ones with a single stock O E. A lower standard deviation means more certainty in the return and less risk. Horico, the returns for portfolios with 33 stocks have to risk than the ones with a single stock