I just need help pls :(

Analyze and evaluate the motivation and the rationale behind western expansion through the louisiana purchase that took hold in the united states at the start of the 19th century (long essay question)

When you can't determine who arrived at an intersection first, yield to the vehicle a. closest to you on the left b. closest to you on the right c. across from you d. with the largest wheelbase

Which of the following characterize the historical move toward urbanization? i. increase in pollution ii. increase in frequency of natural disasters iii. increase in incidence of infectious disease a. i b. ii c. i and ii d. i and iii e. i, ii and iii