As a close relative to the bacteria that cause botulism and gas gangrene, which of the following bacteria are a growing concern in hospitals, killing patients who have been treated with antibiotics:

W) Bacillus anthracis (read as: an-THRAY-sis)

X) Clostridium difficile

Y) Treponema pallidium (read as: Trep-oh-KNEE-mah pal-LID-ee-um)

Z) Vibrio cholera
X) CLOSTRIDIUM DIFFICILE