What did Frederick Griffith find in his work with pneumonia-causing bacteria and mice?

All bacteriophages cause pneumonia in mice.
The carbohydrate coat on bacteriophages causes pneumonia.
A substance from the pathogenic cells was transferred to nonpathogenic cells, making them pathogenic.
Heat-killed pathogenic cells caused pneumonia.

Question

What did Frederick Griffith find in his work with pneumonia-causing bacteria and mice?
 		
	All bacteriophages cause pneumonia in mice.
	The carbohydrate coat on bacteriophages causes pneumonia.
	A substance from the pathogenic cells was transferred to nonpathogenic cells, making them pathogenic.
	Heat-killed pathogenic cells caused pneumonia.

nevermind_justschool · Answer

I believe this was meant for science :)