Where did the germans think d-day was taking place?

They thought we were talking the shortest route across the channel. We purposely gave them faulty information that lead them to believe that our attacks were going to be anywhere along the Atlantic Wall. We left them to believe this with filling comms (radios that we knew they were interfering with) with false information acting like we had no idea they were listening. What is seemed like is we played dumb while they were the ones really being tricked.

Ibelieve the answer is the  third option, or c.