What is the next letter a z b y c x d

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

Plz hurry in the vedic age, what types of goods were traded most often? a.goods that there is a shortage ofb.goods that are expensive and rarec.goods that there is a surplus ofd.goods that are cheap but rarebe the

How were african american politics serving in state governments able to make a lasting difference ?