C I think would be the best answer for this question!
        
             
        
        
        
A forensic scientist must have a minimum of a bachelor’s degree. Although a degree in natural science or forensic science is recommended, some crime scene investigators begin as police officers and lean on their work experience to move into the investigator position. They might hold an associate degree or certificate.
        
             
        
        
        
Answer:
Gamma-aminobutyric acid (GABA)
Explanation:
Gamma-aminobutyric acid (GABA) is the inhibitory neurotransmitter found in the central nervous system of mammals, especially humans, which is responsible for the regulation of communication between the brain cells, and also implicated in the slowing down of signals as neuronal impulses is reduced when it is activated. This is mostly responsible for the extreme uninhibited behaviors often associated with large alcohol consumption.
 
        
             
        
        
        
The pipettes can basically be characterized into five grades. these grades includes the serological, disposable, repeat, single channel and multi-channel pipette. The guidelines for the usage of each of these pipettes differ. However, some instructions are common, such as the control of the flow of liquid. The index finger is used for the purpose of controlling the flow of the liquid from the pipette. 
Hence, the answer is 'index finger'.
 
        
             
        
        
        
Answer:
At least three principle methods of desalination exist: thermal, electrical, and pressure. The oldest method, thermal distillation, has been around for thousands of years. In thermal distillation, the water is boiled and then the steam is collected, leaving the salt behind.
Explanation:
Hope this helped