Why did Operation Overlord surprise the Germans?

They did not think the Allies would invade Europe.
They expected the Allies to invade farther north.
They did not think the Allies would invade in good weather.
They expected the invasion to come the following year.

The Germans expected the Allies to invade farther north.

Explanation:

British secret double agent fed the Germans false information that the Normandy landings were a diversion tactic and that the main allied force was up near Pas de Calais, which was right next to the skinniest section of the English Channel.

The Germans expected the Allies to invade farther north.

Explanation: