Question

in 1938, germany took control of austria in what was known as the
anschluss.
lebensraum.
sudetenland.
rhineland.

Explanation:

The Anschluss was the 1938 annexation of Austria by Nazi Germany. Lebensraum was a Nazi expansionist ideology, the Sudetenland was a region of Czechoslovakia seized later in 1938, and the Rhineland was reoccupied by Germany in 1936.

Answer:

Anschluss.