[单项选择]Current data suggest that although ______ states between fear and aggression exist, fear and aggression are as distinct physiologically as they are psychologically.
A. simultaneous
B. serious
C. partial
D. transitional

[简答题]In general, investment in the United States will be in the form of a subsidiary. It is possible for a non-U.S corporation to operate a branch office in the United States, but there are significant disadvantages to a branch, particularly with respect to its tax treatment.
Branches of non-U.S corporations are not subject to federal regulation or registration requirements. However, each state will require a "foreign" corporation to "qualify" before "doing business" in that state. A corporation will be considered "foreign" if it is organized under the laws of another country or another state, and so this is not a requirement imposed only on non-U.S investors.
"Doing business" is a technical term that implies a substantial presence in the state. This would include the ownership of leasing of real property, the maintenance of a stock of goods for local sale, employee and the like. Selling products to local customers, either directly or through an independent sales representativ

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