Answer:
The answer is I, II
Explanation:
Common-size ratio is a way of expressing each line item of a financial statement as a percentage of a selected line item.
For income statement, each line item is expressed as a percentage of net sales or revenue.
For balance sheet, each line item is expressed as a percentage of total assets.
Both I and II are correct because they are expressed as a percentage of total assets and it is a balance sheet
III is wrong because net profit margin is expressed as a percentage of sales