Question

as a result of the munich agreement, hitler promised to
seek approval before annexing czechoslovakia.
seek permission to expand into austria.
respect the new borders of czechoslovakia.
respect the new borders of the rhineland.

Explanation:

The Munich Agreement (1938) allowed Hitler to annex the Sudetenland from Czechoslovakia. In return, Hitler publicly promised to respect the remaining, new borders of Czechoslovakia. The other options are incorrect: Hitler had already annexed Austria in 1938 before the Munich Agreement, he did not seek approval for full Czechoslovakia annexation, and the Rhineland reoccupation happened earlier in 1936.

Answer:

O respect the new borders of Czechoslovakia.