The ___is the total cost of attending a college or university

This is an ap world history question. i am working on a worksheet which has a vent diagram with each circle labeled either us or byzantine economy. the middle is the similarities. can someone explain to me the similarities and especially the differences between the two?

Meritocracy is the belief that hard work and achievement a: can reduce a persons position in society b: can change a persons position in society for the better c: has little influence on a persons social standing d: can decrease social inequality

Compare and contrast between mitigation and adaptation responses to climate change. this is for my environmental science class. i need 200 words by tonight.