Question

read the excerpt from \the invention of the sewing machine\ by grace rogers cooper
isaac singer, whose name is known around the world as a manufacturer of sewing machines, was the eighth child of poor german immigrants. isaac was born on october 27, 1811, in pittstown, new york, but most of his early life was spent in oswego. he worked as a mechanic and cabinetmaker, but acquired an interest in the theater. under the name of isaac merritt, he went to rochester and became an actor. in 1839, during an absence from the theater, he completed his first invention, a mechanical excavator, which he sold for $2000. with the money singer organized a theatrical troupe of his own, which he called \the merritt players.\ when the group failed in fredericksburg, ohio, singer was stranded for lack of funds
which fact best supports the central idea that isaac singer was a resourceful man?
he was the son of poor german immigrants
he was born on october 27, 1811
he acquired an interest in the theater
he invented and sold a mechanical excavator

Explanation:

Resourcefulness implies the ability to create or find solutions, make use of opportunities. Inventing and selling a mechanical excavator shows his ability to come up with a new idea and turn it into a profitable venture, demonstrating resourcefulness.

Answer:

He invented and sold a mechanical excavator.