In colombian high schools , students have to choose the track they want to be in because each track leads to specific kind of .

a. school

b. diploma

c. instructors

d. escuela nueva

B. Diploma 
In Colombian high schools , students have to choose the track they want to be in because each track leads to specific kind of diploma. 

In Colombian high schools , students have to choose the track they want to be in because each track leads to specific kind of diploma. So, the answer is B.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada