Answer:
Chief Executive Commander-in-Chief,
Explanation:
Given that the President of the United States of America serves the role of the head of state and head of government in the country.
Then the list that includes the roles of the president is being the head of the executive branch of the federal government and at the same time serves as the commander-in-chief of the United States Armed Forces.
Hence, in this case, the correct answer to the question is "Chief Executive and Commander-in-Chief"
Austria-Hungary invaded serbia after the assassination of the arch duke Ferdinand. This started World War 1.
