Observations that are measured at the same time represent what type of data?

A) Time-series data
B) Cross-sectional data
C) Synchronous data
D) None of these choices.

Cross-sectional data represents observations that are measured at the same point in time. Each observation represents a different individual or entity, providing a snapshot of a specific point in time. In contrast, time-series data represents observations that are measured over time for the same individual or entity. Synchronous data is not a commonly used term in statistics.