Question

What significant event triggered the immediate expansion of the duties of the Federal Bureau of Investigation to include crimes such as sabotage and espionage?

the mass production of fixed-wing aircraft

the increased theft of trade secrets form U.S. industrial manufacturers

an increase in the number of available agents who would otherwise have nothing to investigate

the country’s entry into World War I

Answer 1

Answer:

The right answer is " the country’s entry into World War I."

Explanation:

WWI was a global war and it affected the security of the United States.

The authorities had to protect the country from domestic subversion and spionage and sabotage by foreign agents.