What is the term used when union workers refuse to work due to contractual disagreements?

a. labor law violation
b. strike
c. resignation
d. insubordination

according to my research (britannica and quizlet) the first settlements were along the huang river because it could give the crops more fertile soil that really it out. this was due to the yellow slit caused by floods of the river.

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.

he said they would ensure there dominace in the new world meaning anyone who lived there and anyone there would be controlled by columbus as he would dominate the country and defeat them by being the biggest empire in the new world