What subject does a "muckraking" author write about?

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

What types of elections are regulated by the constitution? a. the election of members of congress b. most elections at the local level c. the election of supreme court justices d. most elections at the state level

Based on the information given and the gauges which process or processes have their alarm light on?