Who studies laws to see if they are correct according to the constitution

Which of the following is not true about the supreme court?

The missouri compromise angered because congress had allowed slavery to expand into another state. 1.) thomas jefferson 2.) northerners 3.) white southerners 4.) henry clay

Which of these would be describing a developed country? a) literacy rate of 84% b) life expectancy of 58 years c) post-secondary education rate of 10% d) infant mortality rate of 3 per 1,000 births