What motivated christopher columbus to find a shorter and more efficient sea route to asia?

Which of the following created as part of president johnsons great was most directly aimed at breaking the cycle of poverty in the usa department of transportationb medicarec office of the consumer protectiond head start

How was slavery in mesoamerica, africa, and the arab world similar? many enslaved people were forced to pledge loyalty to their owners. many enslaved people worked in exchange for protection from foreigners. many enslaved people were captured during war. many enslaved people taught and tutored children.

The 20th amendment, also called the lame duck amendment, decreased the amount of time between the presidential election and the inaugration of the new president. what are the advancements that allowed for this amendment?