Why did the commander of the d-day landings, general dwight d. eisenhower, write this letter?

a) eisenhower wrote the note in case all of the d-day landings failed.

b) the cherbourg-havre landing was the only allied landing to fail on d-day.

c) eisenhower believed that he was unfit for command of the d-day landings.

d) the letter was an explanation of why the germans experienced success during the battle of the bulge.