Answer:
d. Vygotsky's concept of the zone of proximal development                   
Explanation:
Zone of proximal development: In psychology, the term "zone of proximal development" is also written as ZPD, and it was proposed by a social constructivist and soviet psychologist named Lev Vygotsky. 
According to Vygotsky, it is described as the difference between the capability of a learner or a child to perform a particular task with the help of another person or guidance or without the help of anyone i.e, by oneself.
In the question above, the given statement signifies Vygotsky's concept of the zone of proximal development.
 
        
             
        
        
        
Answer:
The type of sampling used in Jankowski's study of gangs is Option D. Stratified sampling. 
Explanation:
With stratified sampling, the researcher will partition the population into different groups, usually based on some characteristic that is common to that group. In this case, it was the different kinds of gang membership. Then, the researcher will take a sample of people within each specific group using another sampling method like simple random sampling for instance. The groups that are used in stratified sampling are called strata. Another example would be a national survey that is divided into strata of the different major ethnic groups that comprise the national population. 
 
        
             
        
        
        
Answer:
VALS, an acronyms for Values and Lifestyles
Explanation:
 
        
                    
             
        
        
        
Prices of products became more affordable as a result of new forms of TRANSPORTATION, which got things to market faster and cheaperIn the past, the transportation process could take up to one whole month when delivering goods. Now, as long as you're in the same country, you ould get it on 1-2 days.Hope this helps
 
        
                    
             
        
        
        
The answer to number 1 is b and the answer to number 2 is c