Suppose A new study has found that regular exercise can improve mental health and cognitive function in older adults. The study followed a group of participants over a period of six months and found a significant improvement in memory and mood among those who engaged in regular physical activity. The researchers are now planning to conduct further studies to explore the long-term effects of exercise on brain health.
Can we infer that "All older adults who participate in the study experienced improved memory and mood."? Yes, no, or maybe?