What type of data is recorded by the electrocardiogram?
A. the amount of oxygen in the blood
B. the force from the heart beating
C. the electrical activity of the heart
D. the sound of the heart beating
![What type of data is recorded by the electrocardiogram A the amount of oxygen in the blood B the force from the heart beating C the electrical activity of the h class=](https://us-static.z-dn.net/files/dea/d73e025f9d5c0a19672e6231c8ad7bcc.png)