Its either A or B but I'm pretty sure its A<span />
The Murray river is the longest river in Australia
Based on the given choices above, Lake powell is the is part of the smallest percentage of freshwater. Lake powell is a reservoir on the colorado river which is locarted along rainbow bridge of Utah. COmpare to the other choices which has a vast percentage of freshwater.
The Nile river is the longest river in the world, followed by the Amazon river which is the second longest.
