Answer:
d. do not have physical substance.
Explanation:
The total assets comprise of current assets, fixed assets, and the intangible assets
The current assets include cash, stock, account receivable, etc
Fixed assets include plant & machinery, land, equipment, furniture & fittings, etc.
And, the intangible assets include patents, copyrights, goodwill, and other intellectual properties
For the intangible assets, the amortization expense is considered, not the depreciation expense and the same is to be taken.
Like for goodwill, the impairment test is considered. These intangible assets have no physical substance that means they are not seen or even touched. It is not tangible in nature