The navigable rivers in Western Europe have historically impacted economic development in the region by —

A. providing for the irrigation of arid land
B. blocking the spread of epidemic diseases
C. preventing the advancement of land armies
D. facilitating the movement of goods and people

If u make mistakes on a school trip to knotts like standing up on a ride too early and they ask you not to do it again or and if you do it again you will be escorted out will it go on my student record? yes i know it is a dumb question

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

Which mountain range separates georgia from russia? a. ural mountains b. carpathian mountains c. caucasus mountains d. siberia mountains