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State whether the following is true or false.
Colour alone is sufficient to distinguish the categories on a map intended for a general audience.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: D

A substantial minority of readers cannot separate certain hue pairs, and any sheet may be photocopied or read in poor light. A second cue such as a difference in lightness, a pattern or a label makes the distinction robust.

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