Different languages have different numbers of phonemes and these languages differ because of the number of phonemes these languages have in their language systems.
Languages use only a small subset possible sounds that human speech organs can produce. Then we have Allophony, which is a predictable phonetic variation of a phoneme that will generally make the number of distinct phonemes less than the number of identifiably distinct sounds. Both the Norwegian language, which has up to 42 phonemes, and English, which has about 36, must have more sounds, while some Brazilian rainforest languages, which only have 10 phonemes, must have more distinct sounds, but no more than English or any African language.
The story of Frankenstein is told by Walton. He retells a story that he has heard. So the correct answer to the question that says "Who is telling the story?" would be letter "A" that says "Walton is retelling a story he heard from Frankenstein".