Here's a problem to solve: A scientist will repeat an investigation many times before finally making a conclusion. Which reason best explains why a scientist repeats an investigation?

Among the 4 following options, which is the correct answer?

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