What does IEA stand for?

The correct answer is C, which stands for the International Association for the Evaluation of Educational Achievement. This organization is best known for its role in assessing and improving educational outcomes across different countries through large-scale assessments like the Trends in International Mathematics and Science Study (TIMSS) and the Progress in International Reading Literacy Study (PIRLS). The organization's primary focus is on gathering and comparing data about educational systems, thereby providing insights that can help enhance educational policies and practices globally.

The other options refer to organizations that either do not exist or do not specifically serve the same functions as the IEA regarding educational evaluation and achievement. While they may relate to education or evaluation in some form, they do not encompass the comprehensive international assessment mission that the IEA fulfills.