What did the operators in japan's nuclear power plant use to prevent nuclear meltdown following the 2011 earthquake?
a. ice
c. seawater
b. hydrogen gas
d. carbon dioxide

Which situation would most likely be checked by other branches of the government? a) the judiciary tries to declare a state of emergency. b) the president tries to declare himself commander in chief. eliminate c) the supreme court tries to declare a law unconstitutional. d) the legislative branch tries to declare war on another country.