The following was the result of a regression of P/E ratios on growth rates, betas, and ROE for stocks listed on the S&P 500 in April 2018: P/E = 18.69 + 0.0695 GROWTH - 0.5082 BETA + 0.4262 ROE Which of the indipendent variables has the sign different from the one expected? Scegli un'alternativa: O a. ROE O b. Beta O c. Growth O d. No one