From the words or groups of words lettered A to D, chose the word or group of words that best completes the sentence. ......normal circumstances, it is rare...

Answer Details

The most appropriate option to complete the sentence is "Under". "Under normal circumstances" is an idiomatic expression that means "in normal situations" or "in normal conditions". So, the correct sentence is: "Under normal circumstances, it is rare to get all registered voters to vote."