The correct answer is B) Serving a ceremonial role by discussing the issues facing the country.
The power given to the president in Article 2 of the US Constitution explains how the president must give a "State of the Union" address on a yearly basis. This yearly speech in front of Congress outlines the agenda/ideas of the US president and what he/she would like accomplished over the course of the next year. This ceremonial speech is still done by every single president to this day.
There are 29. That is because there's 14 people before him, and 14 people after, him, and that's 28 and +1 for him and that;s 29. People often make mistakes and say that there's 30 because they count 15 before and 15 after, but there's actually 14 before and 14 after.