In Canadian employment law, "just cause" is the legal standard that an employer must meet to terminate an employee without providing notice or severance pay. Termination for just cause occurs when an employee fundamentally breaches the core obligations of their employment contract. This breach must be severe enough to irreparably destroy the employment relationship and the trust between the employer and the employee. Examples of just cause include severe insubordination, theft, chronic absenteeism after warnings, egregious violations of safety protocols, or gross professional incompetence. It places the fault entirely on the employee's misconduct or failure to perform. Options A, B, and D describe situations related to "constructive dismissal" (where the employer breaches the contract by unilaterally changing terms or forcing a resignation), which legally entitles the employee to severance. Only a severe breach of the employment contract by the employee justifies a strict "just cause" dismissal.