Which of the following is not an effective implementation of the monitoring component of COSO's Internal Control$$Integrated Framework?

a$.$ Management determines which personnel have access to inventory warehouses as part of a security plan for assets.

b$.$ Management reviews current economic performance against expectations and investigates significant deviations to determine the causes.

c$.$ The organization implements software that captures all instances in which the underlying program identifies processed transactions that exceed company$-$authorized limits$.$

d$.$ The organization builds in edit checks to determine whether all purchases are made from authorized vendors, and flags those that are not.