Which of the following is true about Earth's supplies of freshwater?

a. Most liquid freshwater is stored in rivers and lakes.

b. Groundwater is a significant reservoir of liquid freshwater.

c. Liquid freshwater is about half of all the water on Earth.

d. None of the above.

A) is false: there is definitely more freshwater in form of groundwater (water under the ground) than in lakes and rivers

b) - well, the question is, how much would be "significant"? it forms about 20% of total freshwater, and it's probably the biggest source of liquid fresh water - so I would go with this option as the correct one.

c) this is false - it's less than 5%!