Answer
when comparing presidents of the 1800s to those of the 1900s and 2000s, modern presidents are more involved in
a) foreign policy
b) economic issues
c) social issues
d) labor policy

C) social issues

Explanation:

Each period of a country's history has its peculiarities, but some points, such as its concern with the economy, are observed throughout the centuries. During the 1800s this was the presidents' greatest concern for economic development. In the 1900s, the US became involved in many external conflicts, and foreign policy was therefore a pertinent issue. At the end of the last century and beginning of this century social issues became more present. Issues such as diversity, respect for minorities and immigration have become very important to modern rulers, making them more involved in social issues than their predecessors.

the answer is b just took the test

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: