Which of the following best states the main idea of the passage

A．Developing fever is the privilege of warm-blooded animals, so sick lizards can not run a fever.
B．Invertebrates also have the ability to raise their temperature.
C．The internal temperatures of warm-blooded creatures are independent of the weather, so are the coldblooded animal.
D．Sick lizards move into the sun to develop fever.

A．prostaglandins to be formed
B．iron to be made available to bacteria
C．leukocytes to be more mobile
D．lizards to be coldblooded animals