Which factor willincrease a firm's price-to-earnings ratio? There are more than one answers.

a) Increase in the beta of a firm's stock

b) Decrease in the beta of a firm's stock

c) Increase in the risk-free rate

d) decrease in the risk-free rate

e) Increase in a firm's growth rate of cash flow

f) decrease in a firm's growth rate of cash flow

g) Increase in the market risk premium

h) decrease in the market risk premium