Repetition is needed to prove a hypothesis. Repetition is required to publish a conclusion. Repetition ensures the accuracy of obtained data. Repetition helps scientists remain objective about observations.
A scientist will repeat an investigation many times before finally making a conclusion. Which reason best explains why a scientist repeats an investigation?

Options:
- Repetition is needed to prove a hypothesis.
- Repetition is required to publish a conclusion.
- Repetition ensures the accuracy of obtained data.
- Repetition helps scientists remain objective about observations.

Repetition ensures the accuracy of obtained data.