I think it's C, although I cannot say I can explain it confidently. Got to that by the process of elimination.
A - sounds like 'water problems & resource problems & management problems'
, in other words doesn't make much sense
B - Problems of managing water and resources
- not too comfortable with the use of 'managing' + another objection to 'water and resources'
- water is a resource as well. It would sound better if it read 'water and other resources'
. Even if it did, though, I still wouldn't pick B because of 'managing'.
D - clearly out 'problems of water...'
??? Water can't have problems.
E - Resource management problems, including water
- makes it sound like 'water is the problem'
Searching for an answer...