The threat to validity that is likely to occur in the scenario above is Selection Bias.
<h3>What is Selection Bias?</h3>
This occurs when a researcher has control and intentionally chooses those who are going to be researched, observed, or studied. To eliminate this bias, the scientist must ensure that the sample population is selected very randomly.
Other threats to validity are:
- History
- Maturation
- Attrition
- Social Interaction
- Instrumentation
- Testing
- Regression to the mean, etc.
Please see the link below for more about Threat to Validity:
brainly.com/question/4168290
 
        
             
        
        
        
Answer:
4. all of the alternatives are correct  
Explanation:
Criteria for determining that a behavior is habitual include that; the behavior is enacted even if the outcome has been devalued, the behavior is enacted in the absence of motivation, and the behavior is enacted even if the behavior outcome contingency is no longer operative. For a behavior to be habitual, it means that the behavior is exhibited constantly with or without motivation or stimulus, that action or behavior is now a habit.
 
        
             
        
        
        
It contributed to higher production rates
        
             
        
        
        
The statements that accurately describe the Persian Wars are:
A. The Athenians relied on their navy to defeat Xerxes
C. Athens emerged from the wars damaged but ready to rebuild
D. The Greek city-states surprised the Persians with their united effort to defend Greece
E. The Persian armies defeated the Greeks at Salamis
The Persian Empire was the strongest empire that defeated most of the areas of Greece and Athens. The empire was colonizing these countries to further ensure a stronger power or colonization of other powerful countries.