(A) till 2015
(B) till 2016
(C) ** till 2017
(D) till 2018
EXPLANATIONS BELOW
Concept note-1: -Barack Obama’s tenure as the 44th president of the United States began with his first inauguration on January 20, 2009, and ended on January 20, 2017. A Democrat from Illinois, Obama took office following a decisive victory over Republican nominee John McCain in the 2008 presidential election.
Concept note-2: -Barack Obama served as the 44th President of the United States from 2009 to 2017. At his inauguration to the presidency in 2009, Barack Obama was the first African-American to serve as President of the United States.
Concept note-3: -President Obama announced plans to normalize foreign relations with Cuba in conjunction with President Castro, including reopening the U.S. Embassy in Havana in July 2015. The First Family visited Cuba in March 2016, making President Obama the first sitting President to visit the nation in 90 years.