Categorical imperative:

The correct answer is It is universal.
Key Points

• Immanuel Kant was a German philosopher and one of the central Enlightenment thinkers.
• Gave comprehensive and systematic works in epistemology, metaphysics and ethics
• Immanuel Kant gave theory of Categorical Imperative. In Categorical Imperative, Kant described a standard of rationality to which all moral and rational agents are held.
• For Kant, any activity is rational and pure only when it is universally applicable to all and is not relative or situational.

Thus correct answer here is It is universal.