The Classical Time Series Model Combines the Various Components in Which

Multiple Choice

The classical time series model combines the various components in which of the following ways?

A) $y = T \bullet C \cdot S \bullet I$
B) $y = T \bullet ( C + S + I )$
C) $y = T \bullet C \bullet ( S + I )$
D) $y = \frac { T \bullet C } { S \bullet I }$
E) None of these.