Which passage is possibly opinion-based?
a.) ”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" .

b.)”The researchers found two possible explanations for these results, and there was evidence for both" .

c.)"The few places that associate blue with sadness-Hong Kong for example tend to like it less."

d.)”unless you're eating acai berries, one of the few natural foods that take on a purplish hue."