How did the constitution correct the problems of the articles of confederation

Which of the following is one example of an ideological conflict that became one of the causes of world war ii?

How does iraqs geographical location ( desert-like environment ) affect it's politcal relationships? i've been stuck on this and i'm giving a lot of points

Which 19th century technological advancement would best allow farmers along the mississippi river in iowa to quickly transport their crops to buyers in louisiana?