Answer:
America is a unique country that helped him become who he is.
Step-by-step explanation:
President Barack Obama became the first black American to be the President of the United States. And in making history, he also embodies the possibility of achieving anything in a land that embraces and gives freedom.
In his speech, he recollects how his parents and grandparents went through numerous hardships to get to where their son/ grandson is now. But through it all, he credits America for the opportunity to have his success story. He admits "I stand here knowing that my story is part of the larger American story . . . and that in no other country on earth, is my story even possible." To him, America is a unique country that provided him and helped him become the man he is now.
Thus, the correct answer is the third option.