单选题：Copernicus was born in Torun, Poland, on February 19,1473. L

Copernicus was born in Torun, Poland, on February 19,1473. Little is known about his early lifeexcept that his father died when he was 10. An uncle adopted (收养)him, his two sisters, and hisbrother. The uncle saw to it that the two boys received a good education. Copernicus went to the Uni-versity of Cracow. There he studied such subjects as Latin, mathematics, and astronomy. It was proba-bly at that time that he changed his Polish name, Niklas Koppernigk, to the Latin form of NicolausCopernicus. In 1496 Copernicus went to Italy, where he spent the next 10 years studying at variousuniversities.
In Copernicus' time people still believed that all things--the sun, the stars, and the planets--moved around the earth. It was an old belief that few men had ever questioned. Aristotle had basedhis theory of astronomy on this belief. Because the Church had long been the center of learning, thetheory was also linked to religious(宗教的) beliefs.
In 1506 Copernicus returned to his homeland. A few years later he began to work for theChurch. All those years Copernicus carried on his work in astronomy. He had just the most basicequipment and, like other scientists of his day, made observations with only his eyes. Still, using mathe-matics and logic( 逻辑), Copernicus worked out a different theory,which held that the planets wentaround the sun.
Copernicus did not announce his ideas. He did not want to make trouble. But he could not hidethe scientific truth. So he talked about his theory with his friends, who strongly advised him to havehis work published. His great book, On the Revolutions of the Heavenly Bodies, appeared at the veryend of his life. Copernicus saw the first copy on the day he died,May 24,1543.
根据以上内容,回答题.
（　） Which of the following is TRUE about Copernicus? A．He had two brothers and a sister.
B．He used to be called Niklas Koppernigk.
C．He lost his father soon after he was born.
D．He spent 10 years at the University of Cracow.