PERIOD                                                       APPROACH

Period Early Colonial period                      Exploration and description 

 Later Colonial period                                Regional analysis  

1930s through the inter-War period        Areal differentiation       

Late 1950s to the late 1960s                   Spatial organisation       

1970s                                                         Emergence of humanistic, radical and behavioural schools       

1990s                                                        Post-modernism in geography     

THEREFORE THE CORRECT OPTION IS [2].