Answer: Option C 
We will follow the following steps during water quality study : 
1. Onsite assessment 
2. water collection 
3. Measure samples and record
4. study and evaluate 
The oder to follow will be : 
• 4- onsite assessment ;
• 1; - collect water sample 
,
• 3; - measure samples and collect 
,
• 2; - study and evaluate, conclude