Which of the following methods the knowledge and understanding through asking questions and other forms of inquiry

What city was taken back by sumerians in 2100 bc

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

Other in the u.s. supreme court, all federal courts were established bya. the constitutionb. congressc. presidential executive orderd. the states