Explanation:

- Two officials control the judge’s decision: This implies that specific individuals in official positions are influencing the decision.

- Two members control the judge’s decision: This suggests that members of a group or committee are influencing the decision.

- Two principles control the judge’s decision: Justice and impartiality are fundamental concepts or guidelines that influence judicial decisions. Principles are abstract and ideal values, making this the most appropriate option.

- Two advocates control the judge’s decision: This implies that people advocating for specific causes or parties are influencing the decision, which does not align with the nature of justice and impartiality.