Trade agreements of international organizations affect trade in several ways. Here's a breakdown of each option:
A. By incentivizing the development of trade policies - This is true to some extent, as trade agreements can encourage countries to refine their policies to align with international standards and practices.
B. By eliminating tariffs and taxes on imports and exports - This is a significant effect of many trade agreements, as one of their primary goals is to reduce or eliminate tariffs, which directly facilitates increased trade between nations.
C. By encouraging countries to provide open access to trade - Trade agreements often promote open trade policies and non-discrimination, encouraging countries to reduce barriers to trade.
D. By helping smaller countries compete in the world market - Many trade agreements include provisions aimed at boosting the competitiveness of smaller or developing countries, providing them with better access to larger markets.
Given these explanations, all the options (A, B, C, and D) reflect ways in which trade agreements can influence trade. However, if you were to choose just one that most directly impacts trade, B (eliminating tariffs and taxes on imports and exports) is often seen as one of the most immediate and critical effects of trade agreements.