单项选择题
A．Self-esteem matters a lot when one works in a company. B．Self-esteem enables people to confront someone superior. C．Self-esteem is built up on a support system. D．Self-esteem plays a bigger role for the self-employed.
A．The less expensive a product is, the more popular it will be. B．The simpler a product is, the better the design is. C．The less fancy a product looks, the more competitive it becomes. D．The fewer features a product has, the more difficult to sell it.