The correct answer is A) how to appropriately test students performance.
The concern about the educational quality that is determined only at the K-12 level of public education is how to appropriately test students performance.
The K-12 system of public education consists of six years of elementary school or primary school, another four years of Junior High, and finally other two years of Senior Highschool. These are the 12 years of basic public education considered to master basic concepts, skills, and tools that are going to serve the student in their next set of studies, programs, and courses. The concern about the educational quality that is determined only at the K-12 level of public education is how to appropriately test students performance.