✅ The correct answer is option D.
Christopher Cockerell invented the hovercraft in 1956. His early experiments with the idea involved a cat food tin, a coffee tin and an industrial blower.
✅ The correct answer is option D.
Italian, Alessandro Volta discovered the first practical battery in 1800. Life would be very different without batteries.
✅ The correct answer is option D.
Ann got the idea for the Snugli infant carrier from the traditional African baby carriers she observed while a volunteer for the Peace Corps in Africa.
✅ The correct answer is option C.
He was an undertaker, and legend has it, he developed the automatic switch in 1889, to stop competitors from getting his work!