Which passage is possibly opinion-based?

- “The researchers found two possible explanations for these results, and there was evidence for both” (25).
- “unless you’re eating acai berries, one of the few natural foods that take on a purplish hue.”
- “The few places that associate blue with sadness-Hong Kong for example-tend to like it less.”
- “Colors shape how we think and behave in many different areas of life, and sometimes the same color has different effects depending on what we’re doing” (25).