Answer:
A
Explanation:
B can be supported with surveying people,
C can be supported by inspecting Grass under a microscope
The answer is B. This is because baby dolphins, when born, can't really comprehend a lot of things yet, so they, and the more adult dolphins there, try to get to the surface of the ocean to take a breath. :D I hope I helped!
Here is the definition
<span>
an unborn or unhatched offspring in the process of development.</span>
