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Algebra Difficulty 1.0 Junior Find the answer United Kingdom

The ratio $a : b : c = 2 : 3 : 4$ . The ratio $c : d : e = 3 : 4 : 5$ . What is the ratio $a : e$ ?

(A) $1:10$ (B) $1:5$ (C) $3:10$ (D) $2:5$ (E) $1:2$

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Source: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.