If treatment $A$ is both cheaper and more effective treatment $B$

treatment $B$ is said to be dominated by A and It is never optimal to use treatment A

treatment $B$ is said to be dominated by A and It is optimal to use treatment $B$

treatment $B$ is said to be dominated by A and It is never optimal to use treatment B

treatment $A$ is said to be dominated by $B$ and It is optimal to use treatment $B$

treatment $A$ is said to be dominated by $B$ and It is never optimal to use treatment B