Aclient was admitted to a medical unit because the client suddenly experienced total deafness. the client undergoes numerous tests to determine the cause of the deafness. all test results are negative, and there seems to be no organic reason why this client cannot hear. on further review of the client's record, the nurse notes that the client became deaf after witnessing a murder. based on this information and the results of the diagnostic tests, which condition should the nurse suspect the client may be experiencing?