What action caused france and great britain to declare war on germany

The invasion of Poland.

Explanation:

The invasion of Poland and Hitler's refusal to withdraw the German troops from Poland led to the declaration of war by Britain and France.

did you check the study guide?

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.