With a VPN Accelerator Module 2+ (VAM2+) installed in a Cisco 7200 series router, what will be the resulting action when entering the command no crypto engine accelerator slot number?（）
A. disables OIR on the VAM2+ module
B. removes the VAM2+ crypto engine feature and disables the associated configuration commands from the router
C. disables dual VAM2+ hardware stateful failover capabilities
D. disables the crypto engine hardware acceleration, resulting in all crypto functions to be performed in software
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