Which of the following choices are true about the dyes fluorescein and rhodamine?
A)They can be used to label antibodies in immunofluorescence tests. B)They emit visible light in response to ultraviolet radiation. C)They are observed in the fluorescent microscope. D)They are used to identify pathogens of chlamydiosis, Legionnaires'disease, and others. E)All of these choices are correct.