Isabella's current cardiologist is moving to a different state, so Isabella found a new cardiologist. Which is an indicator that the new cardiologist is a poor choice?
(A) The cardiologist is a specialist in the field.
(B) The cardiologist takes most forms of insurance.
(C) The cardiologist has been in practice for 10 years.
(D) The cardiologist is not recommended by her current cardiologist.