The correct answer is D, used in importing/exporting. A banker’s acceptance (BA) is a short-term credit instrument that is commonly used in international trade transactions to facilitate imports and exports.

Step-by-step, a banker’s acceptance is essentially a time draft (a promise to pay) that has been guaranteed by a bank. This guarantee makes the instrument highly secure and marketable. In a typical transaction, an importer’s bank guarantees payment to an exporter at a future date, ensuring that the exporter will receive funds even if the importer defaults.

Choice A is incorrect because banker’s acceptances are short-term instruments, typically maturing in less than 270 days. Choice B is incorrect because they are issued and guaranteed by banks, not broker-dealers. Choice C is incorrect because the defining feature of a BA is that it is guaranteed by a bank, which enhances its credit quality.

Because of this structure, banker’s acceptances are widely used to reduce risk in international trade, providing assurance to both buyers and sellers across different countries.

Thus, banker’s acceptances are primarily used in import/export transactions, making Answer D correct