If You Eventually Realize That You Need to Discontinue Working

Multiple Choice

If you eventually realize that you need to discontinue working for a particular company, and are aware that it is important to do so without making a bad impression, what elements should your resignation letter include?

A) A diplomatic explanation of why you are leaving and a no-holds-barred opinion of your manager(s) .
B) The planned date of departure and details of the next company you will be working for.
C) The planned date of departure and a no-holds-barred opinion of your manager(s) .
D) A diplomatic explanation of why you are leaving and a statement of appreciation for what you have learned on the job.