Answer:
The correct answer is B. II and IV only.
Step-by-step explanation:
Step-by-step explanation:
I. A scientist cannot receive credit for another scientist's work simply by reviewing it. Therefore, this option is incorrect.
II. Reviewing scientific results helps to ensure that the results are accurate. This is one of the most important reasons for reviewing scientific work, as it helps to maintain the integrity and credibility of scientific research.
III. Reviewing scientific results does not necessarily help to ensure that scientists are objective when they perform experiments. Therefore, this option is incorrect.
IV. Sometimes additional important questions can be raised when a scientist's work is reviewed. This is another important reason for reviewing scientific work, as it can help to stimulate new ideas and research directions.
Therefore, the only options that are valid are II and IV.