Choose the sentence that has no errors in capitalization. Question 21 options: A. Neon lights lined the busy japanese street. B. Is that a peruvian guinea pig? C. The strains of the British national anthem played softly. D. Weren't the aztec buildings once brilliantly painted?

The correct option is C) "The strains of the British national anthem played softly." This sentence doesn't have capitalization mistakes since the word "British" is in capital letters. One of the rules of capitalization is that the name of nationalities and countries is always capitalized.

The rest of the examples "Japanese", "Peruvian", "Aztec" are incorrect since none of them are capitalized.