Answer: Option C = 4;1;3;2
Steps explanations :
The main steps of water quality study are on-site measurements; water collection, analyze water sample,study and evaluate results .
In this instance; the order will be as follows
(1) Step 4,on-site measurements.
(2) Step 1 , water collection,
(3) Step 3 , analyze water sample
(4) Step 2 ,study and evaluate results
