Answer: D. It can be conducted with existing data
Explanation:
Cohort studies observe a number of people over a period of time to discover the factors pertaining to a disease such as its causes and effects. It can be prospective, which uses data gathered in the future or retrospective which uses data already collected.
Prospective cohort studies are useful in estimating risk and impractical for studying rare diseases due to the need for a large group. When used to identify the cause of a disease, a hypothesis is tested by monitoring a cohort for any differences in health associated with the risk factor
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Existing data. and the study of diseases with a long latency between exposure and symptoms development apply to retrospective cohort study.
 
        
             
        
        
        
<h2>Answer: D The management of publicity</h2><h2></h2>
        
             
        
        
        
Answer: (D) Uninvolved
Explanation:
  Uninvolved style of parenting is the term which is used as the parenting style in which the parents are not really responsive for their children and they are not able handle all the emotional requirement of the children. 
 The main characteristics of the Uninvolved parenting is that they are treating their children like a friend, Inattentive, Over-indulgent parenting and not at all making good decisions for their child as they never set a boundaries. 
 According to the question, the Herma's parents have an Uninvolved parenting style due to their inattentive behavior. Therefore, Option (D) is correct answer.      
 
        
             
        
        
        
The correct answer is Independent Samples
Explanation:  Independent samples are randomly selected so that changes do not depend on the values of other changes.