Answer:
True.
Step-by-step explanation:
"Establishing a uniform set of currency helped to expand trade."
The statement in the question above is TRUE because when there is a UNIFORM set of CURRENCY, the rate of the transaction costs will greatly reduce. A single or uniform set of currency is a great tool whenever one is talking about international monetary system.
Another reason why countries in a region adopt a uniform set of currency is to make sure they are capable of facing external volatilities.
A uniform set of currency is to make sure that there is price transparency and and there will be nothing like exchange rate fluctuations.
A great example of a uniform set of currency adopts by several countries is the the Euro for countries in the European continent.