Answer:
1. the productivity of the asset varies significantly from one period to another.
Step-by-step explanation:
The units of production depends upon the following information:
1. Purchase value of an asset
2. Residual value
3. Total Estimated production
4. Production units of each year
The formula is given below:
= (Original cost - residual value) ÷ (estimated production bolts)
Now for the particular year, it would be
= Production units × depreciation per units
Hence, the appropriate option is 1.