Final answer:
A 'new order' most likely refers to when a president introduces a fresh philosophy of government through executive actions and strategies regarding national security and foreign policy. The correct choice is c. a president introduces a fresh philosophy of government.
Step-by-step explanation:
The term 'a new order' as mentioned in the question can have several interpretations in the context of presidential actions. However, based on the provided reference material, the most relevant and accurate option would be that 'a new order could mean a president introduces a fresh philosophy of government.'
This is because the use of executive orders, signing statements, and the president's approach to national security, foreign policy, and war can significantly shape a presidency and introduce new principles and methods of governance. Executive orders and direct presidential actions can establish new grounds for policy action and address urgent matters efficiently.