If to follow a proposed categorical imperative is ______,then it is not morally permissible.

A) illegal
B) self-defeating
C) immoral
D) vague

Self-Defeating

Behaviors or actions that undermine one's own goals or interests.

Categorical Imperative

is a concept within Immanuel Kant's moral philosophy stating that certain actions are unconditionally required or forbidden, regardless of their outcomes.

Morally Permissible

An action or choice that is deemed acceptable or right according to moral principles or standards.