As a result of 207 years of Pax Romana, the Roman Empire A) experienced continuing hostilities among neighboring regions
B) experienced peace and prosperity
C) shrank in size and wealth
D) survived invasions from barbarian tribes

B

Explanation:

Pax Romana was a period of peace yes

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: