In which countries do 80% of children either using surface water or have to walk more than 15 minutes to find a protected water source?

Q. In which countries do 80% of children either using surface water or have to walk more than 15 minutes to find a protected water source?

A.            Colombia, China, New Zealand

B.            North Korea, Russia, Ukraine

C.            Ethiopia, Rwanda and Uganda

Answer: Ethiopia, Rwanda and Uganda