If your name is Can Yuan, why should you not answer the phone with "This is Can Yuan's office"?

a. The caller has reached Can Yuan's phone, not her office.
b. Using "office" implies that the person answering the phone is someone other than Can.
c. A simple "Hello" is sufficient.
d. You should always answer the phone with the name of the firm.

B

Rationale: Using the term "office" implies that someone else is answering the phone while Can Yuan has stepped away. You should answer the phone with, "Hello, this is Can Yuan.".