Final answer:
A new president is most likely to inspire citizens by giving an inaugural address during their inauguration. Therefore, the correct option is B. by giving an inaugural address.
Step-by-step explanation:
Inspiring citizens is an important activity of a new president during the inauguration. One of the most significant ways a new president can inspire citizens is by giving an inaugural address. This allows the president to communicate their priorities and vision to the public. Examples of past presidents who have used their inaugural addresses to inspire citizens include Abraham Lincoln, Franklin Roosevelt, and John F. Kennedy.