An Amoebic Trophozoite That Can Be Described as 15 to 20

An amoebic trophozoite that can be described as 15 to 20 microns, with fine uniform nuclear peripheral chromatin, central karyosome, and finely granular cytoplasm would most likely be

A) Entamoeba histolytica.
B) E.coli.
C) Iodamoeba bütschlii.
D) E.hartmanni.