Please help me!!!
The Lost Boy of Sudan

Gabriel seemed like any other young boy eager to finish high school and move to college—that is until one saw his eyes and heard his story. Those long legs that aided him to jump high during basketball practice had survived an amazing journey. Gabriel had walked for three months to Ethiopia from his war-torn village in Sudan. After four relatively safe years in the refugee camp, Gabriel had to flee again. This time, he walked to Kenya. His legs never gave up even in the most trying of times and refused defeat in the face of death. At the age of twelve, Gabriel knew about the world of letters, alphabets, and the possibilities that words promised. His life had more surprises in store for him. One day, he learned that along with a few thousand young refugees from his country, Gabriel was being resettled into America to live a life of freedom. That morning, the sun had never been brighter, and the birds had never chirped in more beautiful melodies. Gabriel looked at the crowd outside his tent—cheering like a crowd of sunflowers facing the sun. He was an orphan, one of the Lost Boys of Sudan, yet he had found himself. When Gabriel jumped high to dunk the ball, his strong legs and soul were the happiest.

Which sentence contributes to the optimistic tone of the passage?
A.
"Gabriel seemed like any other young boy eager to finish high school. . ."
B.
"After four relatively safe years in the refugee camp, Gabriel had to flee again."
C.
"Gabriel was being resettled into America to live a life of freedom. . ."
D.
"Gabriel had walked for three months to Ethiopia from his war-torn village. . ."