Which is true of law enforcement at the county level of government in the united states? the sheriff is an elected law enforcement official. the sheriff is an appointed law enforcement officer. the county coroner is the only elected law enforcement official in the nation. the sheriff’s deputies run for election.

I believe the correct answer is that the sheriff is an elected law enforcement official. 
Even if you take a look at the definition of a sheriff on Wiki, you will see that it says that a sheriff is an elected individual who is responsible with upholding the law within counties. Although this depends on a county, 99% of the time a sheriff is elected.