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Select valid reasons for IT performance issues that cannot be universally solved by adding more hardware：（）
A: adding hardware may exacerbate inefficiency， which can lead to over provisioning and lower utilization
B: performance may degrade due to bottlenecks such as database connections that won’t scale in lock step with other dimensions such as computing capacity or memory
C: both A and B are valid
D: neither A nor B are valid

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出自：Oracle认证

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