$7-$ Why should RIP v$2$ not be run with default settings on a network with discontiguous subnets?

a$)$ It summarises to class boundaries so that remote discontiguous networks are not recognised.

b$)$ It does not send subnet mask information in its routing updates, so it cannot recognise subnets unless they are directly connected.

c$)$ It has a maximum hop count of $15$ and this is not enough to reach discontiguous subnets.

d$)$ It does not support VLSM or CIDR so that it cannot carry out the summarising needed for discontiguous networks.