The correct answer is: [A]: " l-dopa" .
{since "l-dopa" is not known to help much with depression — even for "off-label uses" .
The rest of answer choices:
[B]: "SSRI's" — selective serotonin reuptake inhibitors — are FDA-approved for the treatment of depressive disorders; as are:
[C]: "MAOI's" — monoamine oxidase inhibitors; as well as:
[D]: "HCA's" — heterocyclic antidepressants (e.g. bupropion).
___________________________________________