Which statement is true about the split MAC architecture?

Which statement is true about the split MAC architecture?

• It distributes the processing of 802.11 data and management protocols between a lightweight access point and a centralized WLAN controller.
• Multiple devices can be grouped together to combine total bandwidth.
• The conversation flow can be split between multiple switches.
• The conversation flow can be split between multiple routers.

Exam with this question: CCNP SWITCH (Version 6.0) Chapter 7 Exam