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

The most reliable and valid piece of evidence would be data collected from a controlled experiment that has been reproduced in several different labs. This demonstrates consistency and reliability in the findings, making it more likely to be accurate and trustworthy.