To assess the coverage achieved for structure-based (white-box) test techniques, we need to consider which aspects of the structure have been exercised. Let's go through each option to understand which ones are correct:
Option A) V, W or Y - This option is incorrect because it includes option V, which refers to "Decision Outcomes Exercised." Decision outcomes are typically associated with black-box testing techniques, not structure-based (white-box) testing.
Option B) W, X or Y - This option is incorrect because it includes option X, which refers to "Boundaries Exercised." While boundary testing is commonly used in structure-based testing, it alone does not represent the coverage achieved by structure-based techniques.
Option C) V, Y or Z - This option is correct because it includes options Y and Z, which are both applicable to structure-based testing. "Conditions or multiple conditions exercised" (option Y) and "Statements Exercised" (option Z) are key elements to consider when assessing the coverage achieved by structure-based testing.
Option D) W, X or Z - This option is incorrect because it includes option W, which refers to "Partitions Exercised." Partitions are commonly associated with equivalence partitioning, which is a black-box testing technique, not structure-based testing.
Therefore, the correct answer is C. This option includes the aspects relevant to assessing coverage achieved by structure-based (white-box) test techniques.