An auditor is planning the audit of a nonissuer's inventory. The entity has multiple warehouse locations. The auditor assesses the risk of material misstatement related to the existence of inventory as high due to weak internal controls. Which of the following audit procedures is MOST responsive to this assessed risk?

Requesting the client to perform cycle counts throughout the year and observing a sample of those counts.

Observing inventory counts at all significant locations on a date prior to year-end and rolling forward the balances.

Increasing the precision of analytical procedures performed on inventory turnover ratios.

Observing physical inventory counts at all significant locations simultaneously at year-end.