Which sentence from the passage best states the central idea?

A.
Travelers come from all over the world to visit the beautiful volcanoes of Costa Rica.
B.
Once visitors have picked a volcano and a trail, they need the right supplies and gear.
C.
However, these volcanoes can be dangerous; therefore, it is important to be well prepared.
D.
Before visiting a volcano, hikers need to know if a volcano is active, dormant, or extinct.

C. However, these volcanoes can be dangerous; therefore, it is important to be well prepared.

To determine which sentence from the passage best states the central idea, you need to identify the main message or theme that the passage is conveying.

In this case, the passage is discussing the topic of visiting the volcanoes of Costa Rica and the importance of being prepared. It mentions that travelers come from all over the world to visit the volcanoes (Option A), discusses the need for the right supplies and gear (Option B), and highlights the potential dangers of the volcanoes (Option C). However, the sentence that best captures the central idea is Option D - "Before visiting a volcano, hikers need to know if a volcano is active, dormant, or extinct."

The central idea of the passage revolves around the importance of gaining knowledge about the volcanoes before visiting them, specifically regarding their activity level. This sentence conveys the main message and sets the tone for the rest of the passage, emphasizing the need for hikers to be aware of the volcano's status to ensure their safety.

The best sentence from the passage that states the central idea is: C. "However, these volcanoes can be dangerous; therefore, it is important to be well prepared."