Let's look at all the options:
A) - this is false. People did not change from agriculture fro industralisation because the land was scarce, but because it was more profitable!
B- I think that this is the best answer: agriculture was rather bound to the traditional economy and industralisation is linked to capitalism
C- this is a judgement, not a reason, and it can be argued for or against equally effectively
D- this is not true! people first of all prefer to work at all and be able to live off that work that that's the major reason for the change!