The most accurate response is:
The WTO was established to provide nations with more economic choices. The organization is meant to provide support for struggling national economies and enforce regulations that will keep trade fair. This can negatively or positively impact a national economy, depending on how the nation works with the WTO.
This response captures the key roles of the WTO: promoting trade cooperation, offering support to member nations, and emphasizing that the impact of WTO policies can vary based on individual countries' engagement and circumstances.