For the Purpose of Comparison, What Alternative Should Be Used

For the purpose of comparison, what alternative should be used in assessing an independent project?

A) the "do nothing" alternative
B) other projects, earning MARR or higher interest rate
C) putting money into a bank to earn a bank interest rate
D) investing money in an alternative project that can recoup the investment
E) investing money in an alternative project, which can earn the same interest rate as an independent project