What tool is used to determine when redistricting is needed?

a caucus
b census
c gerrymandering
d primary

B; census

Explanation:

A census is simply a count of the total population. In the United States, a census is taken every 10 years in order to see population distribution. From there, the census is used in order to conduct redistricting.

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the correct answer that would best complete the given statement above would be option b. expanding civil services. diocletian and constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. hope this answer .

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explanation: