Final answer:
The primary purpose of a criterion-referenced reading benchmark is to gauge individual student competency in specific skills, not to compare them with peers or rank them by score.
Step-by-step explanation:
A primary purpose of a criterion-referenced reading benchmark is to identify a student's level of mastery of curriculum-based skills. The correct answer is A: Identify a student's level of mastery of a curriculum-based skill as beginning, developing, or proficient. Unlike norm-referenced assessments, which compare a student to peers, criterion-referenced assessments measure student performance against a fixed set of criteria or learning standards, such as those by the Common Core State Standards Initiative. These benchmarks are evidence-based and designed to be clear and consistent, aimed at preparing students for further education and their future careers by testing their knowledge and higher-order thinking skills.