What Is the Correct Definition for the Abbreviation TEE

What is the correct definition for the abbreviation TEE?

A) Image of the heart produced using sound waves while the patient experiences increases of exercise stress
B) Procedure to look inside a blood vessel
C) Process of inserting a tube into the heart
D) Record of the electrical currents of the heart
E) Record of the heart using sound waves performed by inserting the sonograph into the esophagus