Which fact best supports the central idea that Isaac Singer was a resourceful man?
O He was the son of poor German immigrants.
O He was born on October 27, 1811.
He acquired an interest in the theater.
O He invented and sold a mechanical excavator.

The fact that best supports the central idea that Isaac Singer was a resourceful man is:

D. He invented and sold a mechanical excavator.

Explanation:

Isaac Singer is the famous American inventor behind the sewing machine for domestic use. Among the options in the question, the one that shows how resourceful he was is letter D. He invented and sold a mechanical excavator. A resourceful person is someone who is creative and smart, who has the ability to find solutions for problems quickly and creatively, and who can come up with new ideas. In general, inventors must be resourceful persons, and Singer was no exception.