What must be configured to establish a successful connection from Host A to switch SW-A through router RT-A?

Refer to the exhibit.

What must be configured to establish a successful connection from Host A to switch SW-A
through router RT-A?

A.
VLAN 1 on RT-A

B.
IP routing on SW-A

C.
default gateway on SW-A

D.
crossover cable connecting SW-A and RT-A

Explanation:
In order for the switch to reach networks that are not local, such as networks attached to different
interfaces of the router, it will need to set its default gateway to be the IP address of the attached
router.