After the balance sheet date, an auditor's client suffers a material loss from a decline in value of marketable securities$.$ Which of the following actions should the auditor advise the client to take?

A$.$

Adjust the financial statements to include the material loss.

B$.$

Expand audit procedures to test current prices of marketable securities the client holds.

C$.$

Restate the financial statements as if the material loss occurred at the balance sheet date, including disclosure in the notes.

D$.$

Disclose the material loss in the financial statements to assure that the financial statements are not misleading.