On Completing a Preoperative Assessment, a Nurse Notes That a Client

On completing a preoperative assessment, a nurse notes that a client routinely takes a non-prescribed tranquilliser. The nurse notifies the anaesthetist because:

A) the client won't need as much anaesthetic.
B) the anaesthetist should have noted this.
C) the client is at risk for respiratory difficulties.
D) the client is at risk of delayed wound healing.