The question asks us to identify which major nation announced its withdrawal from the Paris Climate Change Accord in 2017. To solve this, let's consider the context and the options given.
The Paris Climate Agreement, also known as the Paris Accord, is an international agreement aimed at addressing climate change and its effects, by reducing greenhouse gas emissions and promoting sustainable development. It was adopted in 2015 under the United Nations Framework Convention on Climate Change (UNFCCC).
Let's analyze each option:
From this analysis, it is clear that the correct answer is the United States of America. The decision was significant because the USA, being one of the largest emitters of greenhouse gases, influenced global environmental policies and efforts.
Thus, the correct answer to the question is:
United States of America