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Number theory Difficulty 2.0 Junior Find the answer Canada

Natural numbers are equally spaced around a circle in order from 1 to $n$ . If the number 5 is directly opposite the number 14, then $n$ is

(A) $14$ (B) $15$ (C) $16$ (D) $18$ (E) $20$

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.