Distinguish Between Time Series Data and Cross-Sectional Data

Multiple Choice

Distinguish between time series data and cross-sectional data.

A) time series data and cross-sectional are essentially the same.
B) time series data are collected at or represent the same point in time.
C) cross-sectional data are collected over time or represent values in two or more time periods.
D) time series data are collected over time or represent values in two or more time periods.
E) a and c