The Need for International Agreements and Action to Control E-Commerce

The need for international agreements and action to control e-commerce is becoming increasingly obvious as a result of which of the following?

A) Different countries have different rules,thereby impeding the development of e-commerce by responsible enterprises.
B) Some countries are not regulating e-commerce.
C) Some countries are not taxing e-commerce.
D) Different countries have different rules,thereby discouraging the growth of more dubious activities.
E) all of the above