What can you infer about the economy, ideology, and technology of the mongols from the descriptions given?

Was the battle of iwo jima over after us troops raised the flag on mt. suribachi?

Me i really need which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus

Which statement best summarizes how interpreted in very strict terms government have changed over time