Answer:
c) LIFO
Step-by-step explanation:
Indeed, the LIFO (Last in First Out) inventory method is known to give the lowest gross profit when calculating income statement.
Since this method takes account of the most recently purchased items as sold first, and the cost of purchasing erasers and the number of erasers held in inventory has steadily increased, it thus means that items bought costly would be accounted for first leading to low reported gross profit.