(A) Because he pledged to close down Guantanamo.
(B) Because he brought countries together to solve problems.
(C) ** Because he strengthened international democracy.
(D) Because he was the first African American president.
(E) Because he brought peace to his ancestral homeland.
EXPLANATIONS BELOW
Concept note-1: -The 2009 Nobel Peace Prize was awarded to United States President Barack Obama (b. 1961) for his “extraordinary efforts to strengthen international diplomacy and cooperation between peoples".
Concept note-2: -Awarding the Nobel Peace Prize to US President Barack Obama in 2009 failed to achieve what the committee hoped it would, its ex-secretary has said. Geir Lundestad told the AP news agency that the committee hoped the award would strengthen Mr Obama. Instead, the decision was met with criticism in the US.
Concept note-3: -It is conferred by the Norwegian Nobel Committee in Oslo.
Concept note-4: -Liu Xiaobo (Chinese: ; pinyin: Liú Xiǎobō; 28 December 1955 – 13 July 2017) was a Chinese writer, literary critic, human rights activist, philosopher and Nobel Peace Prize laureate who called for political reforms and was involved in campaigns to end communist one-party rule in China.