Answer: B — Sinhala-speakers
Sinhala-speakers are the majority community in Sri Lanka. Their leaders sought dominance and passed measures establishing Sinhala supremacy, including making Sinhala the only official language in 1956.
Source: Majoritarianism in Sri Lanka, Chapter 1
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The passage clearly states that "the leaders of the Sinhala community sought to secure dominance over government by virtue of their majority." This confirms Sinhala-speakers are the majority group. For MCQs, one line with the option and a brief justification from the text is sufficient. Avoid writing more than needed.