Use This Fact Situation to Answer the Related Questions That

Use this fact situation to answer the related questions that follow. Mary and Joan are dentists who practise dentistry in Ontario as Mary and Joan PC.A year after incorporation,one of Mary's patients suffers injuries as a result of Mary's negligence.
In this case,who is liable for the patient's injuries?

A) Mary and the corporation only
B) Mary alone
C) the corporation alone
D) Mary,Joan,and the corporation
E) Mary and Joan only