Which of these would be considered a "synesthetic" phrase?

Name: Which of these would be considered a "synesthetic" phrase?
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Synesthesia is a phenomenon where a person experiences a sensory perception in one modality triggered by a stimulus in another modality, like hearing colors or tasting sounds. Option B, "Loud colors", is an example of this because the auditory sensation of “loudness” is being used to describe a visual phenomenon, colors.

Which of These Would Be Considered a "Synesthetic" Phrase