A. Increase
B. Decrease
C. Remain unaffected
D. Become zero
When inventory is purchased for cash, the cash is converted into inventories and there is no effect on net current assets. The current assets remain the same as before the purchase of inventory the current ratio will not be changed. Quick ratio, however, will be reduced if the cash is converted into inventories because while computing quick ratio inventories are not added but cash is included in quick assets. (Quick assets / current liab.) Quick assets = current assets-inventories.
The correct answer to the question: "If a firm uses cash to purchase inventory, its quick ratio will?" is "Decrease".