Lost City Microbial Samples Must Be Processed in an Anaerobic

Lost City microbial samples must be processed in an anaerobic glove bag because

A) they are potentially harmful,and the anaerobic glove bag keeps scientists from being exposed to them.
B) the glove bag keeps samples of individual species from contaminating one another,which would make the microbes impossible to culture.
C) the anaerobic glove bag maintains a sterile environment that prevents any harmful microbes from growing.
D) the microbes are anaerobic and might be damaged if exposed to oxygen; the anaerobic glove bag eliminates oxygen.
E) All of the above.