In a grading system defined by certain marks, which set contains values from different equivalence partitions?

The correct answer showcases values that belong to different equivalence partitions, reflecting distinct categories of performance in a grading system. In such systems, equivalence partitioning is a testing technique that divides input data into valid and invalid partitions to minimize the number of test cases.

In this context, the chosen set of values includes a mark of 0, which typically represents failure or the lowest performance level. Meanwhile, values like 45 and 79 usually denote passing marks, while 87 represents a high-achieving performance. Each of these marks falls within different categories: failing, just passing, and good to excellent. This diversity ensures that the set effectively tests various boundaries and ensures coverage across the grading range.

This comprehensive breakdown across various performance categories distinguishes the selected set, making it a representative sample that includes values from different equivalence partitions.