What invention caused many deaths while testing it?

A: Dynamite

B: Ladders

C: Race cars

D: Parachute

Explanation: Many people who tried to test the first parachutes died by jumping from high places. One attempt was a parachute hat, but the inventor broke his neck while testing it. The first successful parachute was tested from a hot air balloon in 1797, in France, by Jacques Garnerin.