Answer:
D; confirmation bias
Step-by-step explanation:
During a research or an experiment, scientists may knowingly or unknowingly influence the outcome through some of their actions. This is referred to as research or experimental bias.
Some biases can result from failure to take all relevant variables into account during a research or through a fault in the experimental procedures, other biases can arise as a deliberate attempt to generate a pre-conceived result, otherwise known as confirmation bias.
The correct answer is D