Refer to the exhibit. Which of these best describe why 21.0.0.0 via the next hop of 2.3.4.5 has been selected as the best path to the network? Exhibit:

A.
Because it has the higher MED.

B.
Because it has the shortest AS path.

C.
Because the BGP table has not converged.

D.
Because it is the oldest learned path.