The point of the lean startup concept, "Build-Measure-Learn," is that startups must _______ Group of answer choices constantly test their assumptions, learn from them, and make changes to the business model where necessary. build a product based on their assumptions about the market, measure the level of sales, and learn how to avoid iterating. adhere to their assumptions and execute on the business model, learning how to persevere despite negative feedback from customers. None of these