An election by voters from an entire area (state or county) instead of from a specific district is called a(n)
a. single member election.
b. off-year election.
c. at large election.
d. term election.

The correct answer here is: "at large", as in "at large election" - option C.

An election "at large" refers to an election that chooses representatives to represent the whole body - rather than just a part of this body, as as a district.

The opposite is voting by electoral districts. 

Where are the subjestions