The auditor performs a preliminary risk assessment for a new client. During the initial fieldwork phase, the auditor$$s test of the client$$s controls indicate that certain controls are not operating effectively. Under this scenario, the auditor would most likely take which of the following actions?

A$.$

Determine the impact on the client$$s financial statements without performing additional audit procedures.

B$.$

Revise the preliminary risk assessment and modify the planned audit procedures.

C$.$

Perform additional audit procedures but do not revise the preliminary risk assessment.

D$.$

Issue a modified audit report.