The corect answer is: B. Intercalated disks.
I hope that helped! :)
The answer is D
Explanation:
I apologise for the late answer, but D would be the best one, as it does not discuss morality or anything differing from person to person. The effect it has on birds however, can be readily studied using the scientific method.
Answer:
Proton, neutron, and electron
Explanation:
