When Assessing the Client's AV Fistula,the Nurse Notes Vibration at the Fistula

When assessing the client's AV fistula,the nurse notes vibration at the fistula site.How should the nurse respond to this finding?

A) Contact the health care provider.
B) Ask the client how long this has occurred.
C) Determine when the fistula was placed.
D) Document the finding.