Answer:
B. The Civil War cost more American deaths than any other.
Explanation:
The last battle fought by opposing troops on American soil was Aleutians Islands Campaign.
The most expensive war was WWI for America.
The Civil War was between 1860-1865.
Saddam Hussein had a history of severely violating human rights.
It would be sensible to think he might not care about international law on WMDs or weaponry.