Spell cat? easy question

Rank the following from most to least devasting: ordovician, permaian, cretaceous, pleistocene

How did the end of the mexican american war result in growing sectionalism in the united states?

All of the following statements point out negative aspects of the gilded age except: a. politicians gave government jobs to political supporters. b. political bosses cheated large cities out of millions of dollars. c. industrialists bribed members of congress to ensure favorable votes. d. in 1903, wisconsin became the first state to hold primary elections.