What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?

What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when
configuring a Frame Relay hub in a hub-and-spoke topology?

A.
It avoids split-horizon issues with distance vector routing protocols.

B.
IP addresses can be conserved if VLSM is not being used for subnetting.

C.
A multipoint interface offers greater security compared to point-to-point subinterface
configurations.

D.
The multiple IP network addresses required for a multipoint interface provide greater
addressing flexibility over point-to-point configurations.

Explanation:
you do not have to assign a separate subnet per sub-interface .if you’re using a
Class A network (10.x.x.x/8), you blow the whole network on a few connections (if you used
VLSM, you could use a better mask, limit the addresses used). if you used 10.0.0.0/8, you would

not be assigning the entire /8 to a single network. You would select a subnet mask for the network
and then, you would have to use that mask with all subnets of the network. So if you chose a /24
mask, that would mean that you would have to use a /24 mask for even point-to-point links.