問題：All of the following, except one, are sound principles for devising objectives in order to enact the corporate mission.
　　Which is the exception?
　　A. They should relate to a specified time period
　　B. They should be easily achievable
　　C. They should be specific
　　D. They should be observable or measurable
　　答案：The correct answer is:They should be easily achievable
　　Attainable (which is part of the SMART objectives framework) is different from 'easily achievable'. The objectives should be motivational which means that they should be at least a little bit challenging.