You are conducting an experiment with a spring. You attach hanging masses one after the other, increasing gradually the extension of the spring. When do you know that you have reached the limit of elasticity of the spring? Select all that apply.

A.) By adding more and more masses, the spring is completely stretched out.
B.) By removing the masses before adding a new one, the spring has not fully regained its initial length.
C.) By adding more and more masses, the spring is no longer stretching linearly.
D.) By adding more and more masses, the spring is broken in half.