In Which Way Does a Spine-And-Leaf Architecture Allow for Scalability

Multiple Choice

In which way does a spine-and-leaf architecture allow for scalability in a network when additional access ports are required?

A) A spine switch and a leaf switch can be added with redundant connections between them.
B) A spine switch can be added with at least 40 GB uplinks.
C) A leaf switch can be added with connections to every spine switch.
D) A leaf switch can be added with a single connection to a core spine switch.