Local City Water Supplies Have Been Sources of Parasitic Infections

Local city water supplies have been sources of parasitic infections. The most common organisms implicated in these events include:

A) Cryptosporidium parvum and Giardia lamblia
B) Diphyllobothrium fragilis and Entamoeba histolytica
C) Giardia lamblia and Cystoisospora (Isospora) belli
D) Cystoisospora belli and Entamoeba histolytica