The Figure Below Shows the Possible Routes from City a to City

Multiple Choice

The figure below shows the possible routes from city A to city M as well as the cost (in dollars) of a trip between each pair of cities (note that if no arc joins two cities it is not possible to travel non-stop between those two cities) . A traveler wishes to find the lowest cost option to travel from city A to city M.
What is the cost of the connection between nodes K and I?

A) 9
B) 11
C) 16
D) 21
E) 26