Dynamic routing:a) imposes an overhead cost by increasing network trafficb) decreases performance in networks which have many possible routesc) decreases performance in networks with "bursty" trafficd) does not add to the network traffic and should be used in all network environmentse) is another term for static routing in WANs

a) imposes an overhead cost by increasing network traffic

Explanation:

Dynamic routing also known as adaptive routing a network protocol that allows optimal data routing by selecting paths using complex routing algorithms according to real time routing table changes in a router.

In Computer networking, Dynamic routing imposes an overhead cost by increasing network traffic.