According to the law of supply, price and quantity move A) along a track in the same direction.
B) along a track in opposite directions.
C) from different points toward one another.
D) from the same point away from one another.

Computing equivalent units is especially important for: (a) goods that take a relatively short time to produce, such as plastic bottles. (b) goods with sustainability implications in their production processes. (c) goods that are started and completed during the same period. (d) goods that take a long time to produce, such as airplanes.