Based on the capital asset pricing model, which one of the following will increase the cost of equity, all else constant?

A) a decrease in the risk-free rate of return given a security beta of .7

B) an increase in the risk-free rate given a security beta of .8

C) a decrease in the securitys beta

D) a decrease in the market rate of return given a security beta of 1.4

E) a decrease in the market rate of return given a security beta of .8