When Did Adolf Hitler Have His First True Sense of Belonging

When did Adolf Hitler have his first true sense of belonging?

A) Leading the revolutionaries in Vienna as a teenager.
B) When he began his art career in Vienna and became self-supporting.
C) When he saw the German economy recover under his leadership.
D) During his time as a soldier in the German Army during World War I.
E) When he was elected as Chancellor of Germany.