At a Minimum,which of the Following Would You Need to Know

Multiple Choice

At a minimum,which of the following would you need to know to estimate the amount of additional reward you will receive for purchasing a risky asset instead of a risk-free asset?
I.asset's standard deviation
II.asset's beta
III.risk-free rate of return
IV.market risk premium

A) I and III only
B) II and IV only
C) III and IV only
D) I, III, and IV only
E) I, II, III, and IV