ACME has four possible projects with the following PIs $($profitability indexes$)$:

Project A has a PI of $1\mathrm{.}5,$ Project B has a PI of $\mathrm{.}9,$ Project C has a PI of $1\mathrm{.}2,$ and Project D has a PI of $-\mathrm{.}5.$ Which project$($s$)$ should be accepted if each project is independent of each other?

A only

A$,$ B

A$,$ C

A$,$ D

A$,$ B$,$ C