The Following Questions Refer to the Description Below

The following questions refer to the description below.
While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit) . The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow) .
-What permits reptiles to thrive in arid environments?

A) Their bright coloration reflects the intense UV radiation.
B) A large number of prey and a limited number of predators are available in the desert.
C) A cartilaginous endoskeleton provides needed flexibility for locomotion on sand.
D) Their scales contain the protein keratin, which helps prevent dehydration.
E) They have an acute sense of sight, especially in bright sunlight.

Correct Answer:

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