On the basis of the provided exhibit. Enzos Bikes manufactures high end bicycle frames. Until recently they sold only to bicycle shops; however, now they are starting to sell to end users. They need a way to add two additional sales staff and ensure that the senior sales technician always gets the first call. Drew is the senior sales technician. Bob is the newest sales technician. Bobs phone should always be the last one chosen for incoming sales calls, after Drew and James. Bobs phone should be chosen first only when Drew and James are busy on calls. Select the correct dial-peer command set for Bobs phone.

A.
dial-peer voice 3 pots
destination-pattern 5555110
preference 2

B.
dial-peer voice 3 pots
destination-pattern 5555110
preference firstlast

C.
dial-peer voice 3 pots
destination-pattern 5555110
preference 0

D.
dial-peer voice 3 pots
destination-pattern 5555110
preference high

Explanation:
The router considers lower preferences to be better than higher preferences and the default preference is 0. Therefore, by setting the preference of Bobs dial-peer to 2 we guarantee Bob will be the last one to receive the call (while James priority is set to 1 and Drew uses the default configuration).