How does addition of bandwidth between spine and leaf switches in a FabricPath architecture get utilized?

How does addition of bandwidth between spine and leaf switches in a FabricPath architecture get utilized?
A . Links between the same set of switches are automatically added to a port channel.
B . Adding additional bandwidth is handled dynamically using the 802.1AX protocol.
C . Traffic is load shared automatically across the available paths to the destination.
D . FabricPath uses hardware bonding of physical interfaces to form higher-speed links.

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Answer: C