Are "of which" and "which" used correctly in the following sentence?
> > absolute location is an exact placement on earth which can be identified through the use of a geographic coordinate system (of which uses longitude and latitude).< <

What is the best way to manage oil transport on waterways? a. prevent oil spills and regulate the amount of oil that can be shipped at one time.b. use a skimmer, containment boom or chemical dispersant to clean up spilled oil.c. burn off oil spills from the water's surface when they occur.