Which of the following is true concerning the area known as the Rhineland? a

It became French territory after World War I that was taken by Hitler after World War II started.
b

Hitler got permission to annex the Rhineland from France at the Munich Conference.
c

Hitler sent German military forces to occupy the Rhineland in a clear violation of the Treaty of Versailles.
d

The Rhineland was the name given to the rest of Czechoslovakia which Hitler took after annexing the Sudetenland.