What types of information can we find by conducting the Vertical Analysis (Common Sized Analysis) of the Income Statement records of a few years?

A. The degree of changes (%) of certain expense per unit sales amount over time.

B. The changes of the amount ($) of certain expenses over time.

C. The changes (increase or decrease) of the amount of the Net Profit over time.

D. The changes of revenues amounts (either growing or declining) over time.