“Being a white man, in short, was a very concrete manner of being-in-the-world, a way of taking hold of reality, language and thought.”
What does the theorist signify by the term ‘white man’ here?

The correct option is A form of colonial authority.

Explanation:
In postcolonial theory (most notably in the works of theorists like Frantz Fanon), terms like "white man" are analyzed beyond their biological definitions. Here, the phrase signifies a structural position of power and dominance established through colonization.
By describing it as a "concrete manner of being-in-the-world" and "a way of taking hold of reality, language and thought," the theorist highlights that whiteness functions as a systemic framework. Under colonial rule, the colonizer's worldview, language, and cultural norms are imposed as the universal standard of humanity, logic, and truth.

This systemic imposition defines the very nature of colonial authority, which seeks to control not just physical territories, but also the mental, cultural, and linguistic realities of the colonized subjects. Therefore, the "white man" represents the embodiment of this administrative, cultural, and epistemic colonial authority.