Values must be compared in a chart, but the colours are nearly identical. What improvement would be most useful?

Correct answer: Use clearly distinct colours or patterns

The governing concept is visual discriminability and accessibility in chart design. When colours are nearly identical, viewers may not distinguish the categories or compare their values accurately. Clearly different colours, combined where possible with patterns or labels, create stronger visual cues and reduce dependence on colour alone. Option B therefore improves interpretation. Removing headings, shrinking the chart, or hiding values would reduce clarity rather than solve the comparison problem.