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【单选题】Businesses put lots of time and money into new plans, programs and excellent employees with the hope things will change．Yet, at the end of the effort, not much changes．What happens? In most cases, tho...
A.
What past experience is useful for businesses?
B.
How much time is needed for making plans?
C.
How can changes be made in businesses?
D.
What kinds of employees are the best?