An administrator has configured a virtual switch with Active-Active bond type with MAC pinning (balance-slb)...

Nutanix networking guidance makes this distinction very clearly: balance-slb (Active-Active with MAC pinning) is the bond type used when the administrator wants multi-uplink utilization without additional physical-switch configuration. Nutanix also documents that LACP requires Active-Active / balance-tcp, and balance-slb must not be combined with link aggregation protocols such as LACP. If the switch team turns on LACP while the Nutanix side remains in balance-slb, the uplink behavior is mismatched and degraded throughput is the expected result. Therefore D is the correct answer.

This is a classic exam trap because both balance-slb and balance-tcp are Active-Active styles, but they are not interchangeable. One is switch-independent and the other is switch-dependent with LACP. The problem here is not MTU, uplink count, or support for vs0. It is the fact that the switch configuration and AHV bond mode no longer agree. In Nutanix, if LACP is enabled on the switches, the virtual switch must be configured for the LACP-compatible Active-Active mode, not MAC pinning. That is why D is the authentic answer.