The author feels that the scientists' study of Surtsey – A made it famous. made them wealthy. C was unnatural. was a waste of their time.

made it famous

Explanation:

"Surtney" is a volcanic island that is located in Iceland. It is said to have been formed from a volcanic eruption, which many scientists have continued to study. They found interesting facts about the island, which started barren but later on, supported many life forms.

The research of the scientists on the island made it famous because it gave the people a lot of information. With the help of scientists, many things about the island were disclosed to the public and this made it even more popular.

So, this explains the answer.

the answer is:

to persuade readers that a conquering prince must destroy a former republic if he hopes to hold it.

in the excerpt from "the prince," the author niccolò machiavelli suggests that to take possession of a city and endure the control over it, it is necessary to destroy it first. otherwise, people who have known freedom will eventually turn against the new rulers and fight back to recover their power.