What is the name of Thomas Mann's novel that explores the themes of time, isolation, and intellectualism?

Thomas Mann's novel that delves into the themes of time, isolation, and intellectualism is titled "The Magic Mountain." Set in a Swiss sanatorium before World War I, the narrative follows Hans Castorp, who undergoes a profound personal journey as he grapples with existential questions and the nature of time while isolated from the outside world.

The novel presents a rich exploration of the impact of isolation on the human psyche and the intellectual debates surrounding life and death, particularly through conversations and encounters with diverse characters in the sanatorium, including individuals who embody various philosophical perspectives. Mann uses the setting to create a microcosm of society, allowing for a deep analysis of intellectualism and the human condition amid the backdrop of a society on the brink of dramatic change.

Choosing "The Magic Mountain" as the correct answer is based on its direct engagement with these themes, contrasting with the other options, which either belong to different literary periods or address other societal issues, characters, and challenges. For example, "The Stranger," while focused on themes of absurdity and existentialism, is not by Mann, just as "Invisible Man" centers on racial identity and social invisibility, and "Eugene Onegin" deals with romantic relationships and societal