One impressive cave system is the lava tube caves of Lava Beds National Monument. The caves provide a safe habitat for millions of bats. In order to visit the caves, visitors must first be screened for white-nose syndrome. It is a disease that is fatal to bats. Which option best identifies the central idea of the paragraph?

A. The caves are a safe habit

B. Lave tube caves are found in national monument.

C. The lava tube caves are part of the cave system that provides homes for millions of bats.

D. Visitors must be screened for white-nose syndrome before visiting the caves

Read the following passage: he roamed from chamber to chamber with hurried, unequal, and objectless step. the pallor of his countenance had assumed, if possible, a more ghastly hue— but the luminousness of his eye had utterly gone out. the once occasional huskiness of his tone was heard no more; and a tremulous quaver, as if of extreme terror, habitually characterized his utterance. there were times, indeed, when i thought his unceasingly agitated mind was laboring with some oppressive secret, to divulge which he struggled for the necessary courage. which of the above ideas might be considered foreshadowing? he is wandering all over the chamber his skin tone is really pale his voice is quivering the narrator thinks he is laboring with an oppressive secret