Trade is defined as A. buying and selling of goods and services. B. buying of goods only. C. distribution of goods and services. D. marketing of a company's product. E. selling of goods only. Buying and selling of goods between two countries is _______ trade.

Here are the answers to your questions:

3. Trade is defined as

A. buying and selling of goods and services.

Trade encompasses the exchange of both tangible products (goods) and intangible activities (services) between parties.

The correct option is $\boxed{\mathbf{A}}$.

4. Buying and selling of goods between two countries is ____ trade.

A. bilateral

Bilateral trade specifically refers to the exchange of goods and services between two distinct countries.

The correct option is $\boxed{\mathbf{A}}$.