You Have Picked Up Your Equipment and the Supplies Necessary

You have picked up your equipment and the supplies necessary to obtain a medical history from a new patient.You introduce yourself to the patient after confirming her identity.Then you attempt to put her at ease.What is the next thing you should do?

A) Wash your hands. 
B) Begin to ask questions. 
C) Explain the purpose and importance of information gathering. 
D) Ask about allergies.