I think it is: Explain how ELECTORAL COLLEGE works in electing a president
Answer:
The poisoned substance was mixed with arsenic-free zinc and sulfuric acid, resulting in arsine gas.
The gas was later ignited and decomposed into pure metallic arsenic. This test was highly sensitive and could detect even one-fiftieth of a milligram of arsenic. It was a remarkable discovery, since before that, arsenic was widely used as poison in enormous amounts of murders, impossible to detect and trace.
I currently searched up the question your looking for and this is what I somewhat found
<em>Civil wars and foreign invasions showed that the empire had become too large to be ruled by one person.</em> :-)
