Which of the following pieces of evidence would be considered the most reliable and valid?

data collected from a controlled experiment that has been reproduced in several different labs

data reported by a world-renowned expert that cannot be reproduced in a different lab

data collected from a thousand individuals that cannot be reproduced under different circumstances

data from a single observation of an event that has not been witnessed again

The data collected from a controlled experiment that has been reproduced in several different labs would be considered the most reliable and valid. This is because the replication of results in different labs helps to confirm the accuracy and validity of the findings.