Answer:
The correct answer is option:
C) ninety percent of his income, as gifts to social and educational causes
Step-by-step explanation:
Carnegie In the United States and the British Empire, he became a prominent philanthropist. He donated $350 million (conservatively $65 billion throughout 2019 dollars, based on percentage of GDP) to hospitals, foundations, and colleges over the last 18 years of his life – almost 90% of his fortune.