Read the statements in order to mark only the correct ones ...

Read the statements in order to mark only the correct ones according to the text.

I. The military aviation work had to be controlled by Europe in the beginning of the 1940s because of a war.

II. Because of a war, the government resolved to unify the military aviation operation under a single command.

III. A single officer was chosen to concentrate the military aviation skills.

IV. As the Brazilian government got worried, it was decided to join the military aviation operations due to air European war.