Which of following was a provision of the Currency Act?

A.
Foreign trade had to be conducted in gold and silver.

B.
Colonists were not allowed to export British currency.

C.
Cotton was made a form of legal tender.

D.
Colonists were taxed if they used non-British currencies.

To determine which of the following was a provision of the Currency Act, we can analyze each option:

A. Foreign trade had to be conducted in gold and silver.
This provision was not part of the Currency Act. The Currency Act did not dictate the use of specific materials for foreign trade.

B. Colonists were not allowed to export British currency.
This provision was indeed a part of the Currency Act. The act prohibited colonial governments from issuing paper currency in the future and also prohibited the export of British currency from the colonies.

C. Cotton was made a form of legal tender.
This provision was not part of the Currency Act. The act did not regulate the use of specific commodities as legal tender.

D. Colonists were taxed if they used non-British currencies.
This provision was not part of the Currency Act. The act primarily focused on regulating the issuance and use of paper currency in the colonies.

Therefore, the correct provision of the Currency Act among the options provided is B. Colonists were not allowed to export British currency.