Which Example Best Fits the Definition and Expectations of a Start-Up

Which example best fits the definition and expectations of a start-up company?

A) NoConcussion, a company that manufactures equipment to be placed inside football players' helmets to prevent concussions
B) MeID, a company that uses sophisticated blockchain technology to provide ID verification for all human beings based on their individual physiological (biometric) characteristics, such as fingerprints and eyeball scans
C) A New Leash on Life, which creates and sells diamond-studded leashes for dogs owned by the world's wealthiest people
D) Live or Die, a vacation company that specializes in dropping people off in remote locations with no supplies, and forcing them to life off the land or die trying
E) Umbi, a small company that offers a kit that allows new parents to preserve their babies' umbilical cords for life