As the Northwest Passage north of Canada slowly becomes navigable, what is a not a reason

Canada is seeking to have it recognized as territorial$/$sovereign waters.

a$.$ No navigation infrastructure exists, and it will need to be developed at great

cost$.$

b$.$ Canada needs to control the type of cargo that travels its Arctic waters.

c$.$ There$$s little distance or fuel benefits to using the Northwest Passage,

d$.$ Canada seeks to charge transit tolls.