Answer:
He had to find the right ingredient to make his filament burn slowly in the vacuum.
The answer is C) cost and benefit
Cities located in arid climates are negatively affected by floods from nearby rivers
The causes of the French Revolution are complex and are still debated among historians. Following the Seven Years' War and the American Revolution, the French government was deeply in debt. It attempted to restore its financial status through unpopular taxation schemes, which were heavily regressive. Leading up to the Revolution, years of bad harvests worsened by deregulation of the grain industry also inflamed popular resentment of the privileges enjoyed by the aristocracy and the Catholic clergy of the established church.
Luke depicts Jesus in his short-lived ministry as deeply compassionate — caring for the poor, the oppressed, and the marginalized of that culture, such as Samaritans, Gentiles, and women. Whereas Matthew traces Jesus' genealogy to Abraham, father of the Jewish people, Luke goes back to Adam, parent of us all.