What is a time series, and what are the potential components of demand variation it may contain?
A) A time series is a randomly ordered set of data with no specific structure, containing trend, seasonal, and autocorrelation components.
B) A time series is chronologically ordered data that may contain components of demand variation such as trend, seasonal, cyclical, autocorrelation, and random.
C) A time series is a collection of unrelated data points, devoid of any demand variation components.
D) A time series is a cyclical arrangement of data with a fixed pattern, excluding any demand variation components.