(A) ** 15 minutes
(B) Half hour
(C) One minute
(D) two hours
EXPLANATIONS BELOW
Concept note-1: -President of the United States Barack Obama delivered a speech at the Together We Thrive: Tucson and America memorial on January 12, 2011, held in the McKale Center on the University of Arizona campus. It honored the victims of the 2011 Tucson shooting and included themes of healing and national unity.
Concept note-2: -Once while Obama was backstage rehearsing his speech, he met Kerry staffer and speechwriter Jon Favreau (later to become Obama’s speechwriter), who instructed him that to avoid overlap with Kerry, a sentence had to be changed.
Concept note-3: -"A More Perfect Union” is the title of a speech delivered by then-Senator Barack Obama on March 18, 2008, in the course of the contest for the 2008 Democratic Party presidential nomination.
Concept note-4: -Barack Obama’s farewell address was the final public speech of Barack Obama as the 44th President of the United States, delivered on January 10, 2017 at 9:00 p.m. EST.