Final answer:
A multiple baseline across situations design involves measuring behavior at different times for a single individual to establish a baseline for comparison. The correct option is (C).
Step-by-step explanation:
A multiple baseline across situations design is a research design that focuses on measuring behavior at different times for a single individual to establish a baseline for comparison.
This design involves observing and measuring behavior in different situations or settings before introducing the treatment. By doing this, researchers can assess if the treatment has a consistent effect across different situations or if the behavior change is specific to the targeted situation.