A. El Salvador
I believe the U.S. thought China wasn't worth spending money on and Canada had no part in the cold war. Plus Puerto Rico is a part of the U.S. Leaving El Salvador as the most logical answer.
You might be talking about the Stanford v. Kentucky (1989),
where the U.S Supreme Court ruled that offenders at least 16 years old at the time
of the crime can be punished with death penalty. Doing so would not constitute
cruel and unusual punishment. That means 16-year olds who committed heinous
crimes can be put to death. The ruling was overturned with the Roper v. Simmons
in 2005, which forbade capital punishment for juveniles.
D. More land. more land equals more power.
Legislative court has original jurisdiction over disputes between states
