Answer:
effectiveness
Explanation:
SmartToy has proven in this new toy line its effectiveness, as it has proven its ability to reach the desired result with a great success degree. The new IA was a bet, and a risky one. However, betting on a new technology raised that toyline quality to a new level and resulted in so much success in the market that the market share increases fivefold. That alone corroborates the company's effectiveness.