An Employment Manual Contains a Notice and Disclaimer That the Employment

An employment manual contains a notice and disclaimer that the employment is entirely "at will," and also contains a progressive discipline system which recites an escalating series of notices and warnings before termination. If an employee is terminated immediately, and the progressive discipline system is not followed:

A) the termination is justified because the manual contains an "employment at will" disclaimer
B) the termination is not subject to legal redress because the manual contains an "employment at will" disclaimer, so the employer had a right to terminate employment without conditions
C) the termination is suspect because the progressive discipline system was not followed
D) the termination is lawful because the employee did something wrong