Concept:Chambers of commerce promote trade and business by organising fairs and exhibitions.
Explanation:A chamber of commerce acts as the spokesperson for the business community.
It collects and shares relevant trade information with its members.
One of its key functions is organising industrial fairs, trade exhibitions, and local or international trade fairs.
These events create buyer awareness and promote members' businesses.
Trade associations usually represent only one specific trade or industry.
Labour unions mainly protect workers' interests, not trade promotion.
Customs and excise authorities enforce government tax and import laws.
So, organising local and international trade fairs is the role of the chamber of commerce.
Answer:C. Chamber of commerce