The author implies that which one of the following is true of economic development agreements? A. They provide greater economic benefits to the governments that are parties to such agreements than to foreign investors. B. They are interpreted differently by courts in the United Kingdom than they are by courts in the United States. C. They have proliferated in recent years as a result of governments' attempts to make them more legally secure. D. They entail greater risk to investors when the governments that enter into such agreements reserve the right to modify unilaterally the terms of the agreements. E. They have become less attractive to foreign investors as an increasing number of governments that enter into such agreements consider them governed by the law of ordinary contracts.