Jubal knows that motorcycle riders are aging out, so he is developing a motorcycle that will appeal to the younger generation. It will be capable of self-balancing, there will be no need for the rider to put their feet down at stoplights, it will be based on balance and weight distribution. He has built a prototype and has been running tests in an empty parking lot to determine whether the idea will actually work. Which phase of the creative process has Jubal reached?

Group of answer choices

Quality control

Preparation

Research and development

Due diligence

Verification