Answer: B. Inventory investment must be negative.
Step-by-step explanation:
Inventory investment simply means the difference between the goods that are produced and the goods that are sold by a company during a given year. Inventory investment is given as:
= Production - Sales
Since the company sells 100 boxes of chocolate, but produced 90 boxes of chocolate during the year, then the inventory investment will be:
= 90 - 100
= -10
Therefore, the inventory investment is negative.