In paragraph 5, how does the author develop the idea that scientists use what they know about modern sharks to learn more about Megalodon? by comparing the size of the teeth of each kind of shark

by comparing the teeth left behind by each kind of shark

by comparing the prey eaten by each kind of shark

by comparing the rows of teeth of each kind of shark

Paragraph 5
Megalodon left an awful lot of teeth behind, but don't worry. It is likely that it had plenty of extras. Like modern sharks, Megalodon had several rows of teeth. Scientists believe that Megalodon had six rows of 7-inch-wide, razor-sharp teeth, top and bottom, for a total of 276 teeth in its giant jaws! It's no wonder, then, that this ancient shark left so many of them behind. Without this trail of teeth, we would not know that these enormous creatures swam the ancient oceans as a top predator.