B, an artificial pacemaker.
Explanation:
Warfarin (Coumadin) is used to slow blood clotting. By helping the blood clot, vitamin K might decrease the effectiveness of warfarin (Coumadin). Be sure to have your blood checked regularly. The dose of your warfarin (Coumadin) might need to be changed.
Answer: Demand Characteristics
Explanation:
Demand Characteristics in research can be defined as the characteristics which is associated with the experimental artifact where the participants from an interpretations of the experiment's purpose.
Here, the professor's conducted an experiment and required to get the form filled by participants whether they want to choose ethical or unethical.
Most of the participants choose ethical. This shows that the participants are in favor of ethical topic. This is an example of Demand characteristics.
