Answer:
The correct answer will be option-having a constant in your experiment.
Explanation:
A scientific investigation is a systematic approach to understand and explain the natural phenomenon that takes place in nature.
The recording of accurate data plays an important role in the scientific investigation as the results prove or disprove the predicted hypothesis through experiment.
The error in collection of data can cause the error in drawing the conclusions from the results and the most possible sources of error in data could be the incorrect and wrong way of measurement and having no replicas or trials of the sample.
The constant variable does not influence the conclusion as it is kept constant and thus is the correct answer.
