In a Cisco Nexus 7000 platform configured with GLBP， which GLBP timer can be tuned to prevent unnecessary GLBP state changes during a switchover or ISSU？（）

• A、 GLBP redirect timer
• B、 GLBP forwarder pre-empt delay minimum timer
• C、 GLBP hold timer
• D、 GLBP pre-empt delay minimum timer
• E、 GLBP extended hold timer
• F、 GLBP nonstop forwarding timer