I think it might be d but please let me know if it is right
10:$82$2(2&/(27/(6;/(262)/(22•23)=46
The answer is C
Lincoln was against slavery and had changed his beliefs
The type of wave which needs a medium to travel are sound waves because they travel by oscillating electromagnetic fields
<h3>What is a Sound Wave?</h3>
This refers to the waves of refraction which is propagated by a plastic medium.
With this in mind, we can see that mechanical waves are the types of wave that needs a medium for propagation and a sound wave is an example of a mechanical wave because it travels by oscillating electromagnetic fields.
Read more about mechanical waves here:
brainly.com/question/9242091
What are the possible answers?