Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations，  what will the given formula provide？（）

• A、 fiber loss
• B、 OSNR level
• C、 post amplification
• D、 index of reflection
• E、 index of refraction
• F、 power post amplification budget