You have the daily returns for your portfolio and you are evaluating its performance. The portfolio has a high standard deviation of returns. By definition, a portfolio with a high standard deviation of returns will always have: Select one: a. Daily return observations that are extremely negative O b. Daily return observations that are much higher or lower than the mean c. Daily return observations that are extremely positive d. A high mean daily return e. All observations of daily returns closely clustered around the mean daily return observation