Final answer:
The opacity of unit testing can be categorized as both whitebox testing and blackbox testing.
Step-by-step explanation:
The opacity of unit testing can be categorized as both whitebox testing and blackbox testing.
Whitebox testing evaluates the internal structure of a software component, while blackbox testing focuses on the external behavior of the component without considering its internal implementation.
Therefore, both whitebox testing and blackbox testing are valid types of unit testing and can be considered as options in this scenario.