Answer:
d.Net income is understated.
Explanation:
based on the inventory identity:
[tex]$Beginning Inventory + Purchase = Ending Inventory + COGS[/tex]
If merchandise at the end of the year is understated, to balance the identity the COGS must be higher than it should be.
Thus, the net income will have a greater COGS than it should. This will generate a net income which is lower than the correct income if merchandise inventory weren't understated.