Which of the following is/are empirical evidence that Lo, Mackinlay and Cambell found using the Volatility Ratio (VR) tests of the random walk hypothesis for CRSP equal- and value-weighted indexes for the sample period from 1962 to 1994? Select one: O a. Results from Lo, Mackinlay and Campbells empirical evidence show that market size does not actually have an impact on variance ratios as much as was thought before O b. Lo, Mackinlay and Campbells empirical evidence showed that evidence against the random walk was strong for larger companies, but as size decreased, the evidence became weaker O c. None of the options O d. Lo, Mackinlay and Campbells empirical evidence showed that the hypothesis of returns following a random walk is not rejected for individual securities, but it is for portfolios O e. All of the options