Among the Reasons Presented as to Why International Investment Is

Among the reasons presented as to why international investment is smaller than models of international investment suggest it should be is:

A) the increasing use of government barriers to international investment at the very end of the twentieth century.
B) the improvement in legal protection of property rights and contract enforcement.
C) the continued, albeit diminished, use of explicit government barriers to international investment.
D) the formation of the European Union.