A scientist wants to make their experiment more accurate. Which of the following should they do to ensure this.

decrease their sample size

nothing; there is no way to increase the accuracy of an experiment

increase their control amount

increase their sample size

3 answers

Whoever worded this question needs to proofread his/her grammar.
Yes, the grammar is wrong. But to the question, what do you think, Alex?
Grammar aside, the answer is D. However, I think the question confuses accuracy with precision. The D answer is for increasing precision; it may or may not improve accuracy. None of the other answers will improve accuracy either.