The Network of Walls in the West Bank and the Elaborate

The network of walls in the West Bank and the elaborate and expensive system of bypass roads that enabled Israelis to commute from West Bank settlements to major cities without having to come in contact with Arab inhabitants were an effort to

A) modernize the roadways and most-used routes
B) isolate and fragment Palestinian villages in order to disrupt established networks as well as absorb large tracts of Palestinian agricultural land
C) disengage Israelis from Palestinians
D) make it so difficult for the Palestinians to travel that they did not engage in seeking work in the cities where their access was limited