Which of the following allows virtual machines to share the NIC of the host?

Virtual LANs (VLANs) segment and tag network traffic for isolation purposes but are not the mechanism that enables VMs to share the host's physical NIC.

NAT translates IP addresses between a private VM network and the external network but uses a separate virtual network internally rather than directly sharing the host NIC.

Bridging creates a software bridge between the host's physical NIC and the virtual NICs of one or more VMs, making each VM appear as a distinct device on the physical network. Traffic from any VM passes through the host's NIC to the external network, effectively sharing the single physical adapter across all bridged VMs.

Virtual NICs are the software-emulated network adapters assigned to each VM, but they require bridging (or another mode) to connect them to the host's physical NIC - virtual NICs alone do not enable the sharing.