Option c is the correct answer.
The MMPI  is an objective test.
 
What is MMPI?
The MMPI is the objective personality test that is utilized the most commonly. Hathaway and McKinley released it in 1943, and in 1951, they rewrote it. 
It has 566 questions that may be answered yes or no and is intended for people aged 16 and up. It can be given to an individual or a group, and the answer papers can be graded manually or automatically. The respondent is required to read each question, determine whether it applies to them personally, and then indicate their choice on the answer sheet. Eight clinical scales and four validity scales make up the test.
To learn more about MMPI click the given link
brainly.com/question/21770852
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The ecosystem is an ecological system consisting of all of its biotic and abiotic factors
 
        
                    
             
        
        
        
Answer:
To observe the cheek cell,
- 
Take a tooth pick use its blunt side to scrap inside the mouth.
- You will see some deposition on the blunt side of tooth pick, make a smear on the clean slide in the center using that tooth pick.
- Add a drop of methylene blue solution and place a coverslip, make sure that bubbles are avoided i.e. coverslip should be placed in the inclined manner.  
- Remove the excess solution and observe it under the microscope first under 4X and then under 10X. 
Observation:  
- The cells observed are squamous epithelial cells. The small blue dots seen inside will be the bacteria from our teeth and mouth.
 
        
             
        
        
        
There are two main theories for the lack of organic material in desert soils. Firstly, the organic life in most deserts is so sparse that it cannot produce much organic matter. Secondly when things do die and decompose in the desert the heat and sunlight often bleach nutrients out of the matter before it is decomposes enough to be absorbed into soil