What of these inventions greatly contributed to the expansion of sea exploration in the 1400s?

Small plane just crashed in your neighborhood. you take a fire extinguisher and blankets to the scene, then stand back and silently gather with others on the scene when you realize there is nothing you can do to . in this situation, gathering quietly with others out of reverence and respect is an example of coping.

Which technological breakthrough of the 1950s revolutionized the way that americans kept up with news and world events? a) radio b) internet c) television d) motion pictures

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?