Which statement about slow inter VLAN forwarding is true?

A point-to-point collisionless connection generally implies a full-duplex link, which would typically operate efficiently and not inherently cause slowness in inter-VLAN forwarding.

Multiple devices connected to the same hub implies a shared collision domain, which inherently causes slowness for all traffic, not just inter-VLAN, but duplex mismatch is a more specific and common cause of 'slow forwarding' in modern switched networks.

While possible, 'traffic to the alternate VLAN is forwarded slower' is a general observation and not a specific root cause like duplex mismatch, which directly explains the mechanism of slowness.

This is a general statement that the VLAN is slow, but doesn't provide a specific technical reason for the slowness, whereas duplex mismatch is a precise cause.

A duplex mismatch occurs when one side of a link operates in full-duplex and the other in half-duplex, leading to collisions (on the half-duplex side trying to transmit while receiving) and discarded packets, which significantly slows down traffic forwarding, including inter-VLAN routing.