The answer is option A "bias." A scientist bias is a opinion on something or someone so in this case a scientist bias on a experiment can effect the experimental results because of what the scientist think is correct so the answer would be option A. It's not option B because curiosity would most likely cause you to test your hypothesis with a experiment. It's not option C because inductive reasoning is supplying evidence for the truth of the conclusion. It's also not option B because deductive reasoning is the opposite of inductive reasoning.
Hope this helps.