A) to be about 25 million years old and ranking as the largest in the world in terms of volume, Lake Baikal in Southern Siberia can hold about 5,700 cu.mi of water, roughly 20 percent of the planet’s fresh water resources, and harbours
This has everything in place hence let us hang onto this
(B) to be about 25 million years old and ranking as the largest in the world in terms of volume, Lake Baikal in Southern Siberia holding about 5,700 cu.mi of water, roughly 20 percent of the planet’s fresh water resources and harbour
It's never harbour it should be harbours
(C) to be about 25 million years old and ranking as the largest in the world in terms of volume, Lake Baikal in Southern Siberia can hold about 5,700 cu.mi of water, roughly 20 percent of the planet’s fresh water resources and can harbour
it is not the potential of harbouring it is already harbouring
(D) as about 25 million years old and ranking as the largest in the world in terms of volume, Lake Baikal in Southern Siberia can hold about 5,700 cu.mi of water, roughly 20 percent of the planet’s fresh water resources while harbouring
This has as in the begining which led me to think otherwise it's spot on
(E) at about 25 million years old and ranking as the largest in the world in terms of volume, Lake Baikal in Southern Siberia can hold about 5,700 cu.mi of water, roughly 20 percent of the planet’s fresh water resources to harbour
Water resource is harbouring it's not a future process