With reference to the trait theory proposed by Gordon Allport, into which three categories—Cardinal, Central, and Secondary—did he classify personality traits? Among these, which of the following is the most primary characteristic of a 'Cardinal Trait'?

Gordon Allport has studied personal characteristics very closely in the formation of personality within his trait theory. According to him, a 'Cardinal Trait' is such a central and dominant part of a person's personality that most of that person's actions, decisions, and behaviors are guided by it. Such traits are rarely found in people and become the historical identity of that person (e.g., non-violence for Mahatma Gandhi). In this context, you can get detailed information about various theories of personality through the Wikipedia reference.