There Are Fewer Antifungal, Antiprotozoan, and Antihelminth Drugs Compared to Antibacterial

There are fewer antifungal, antiprotozoan, and antihelminth drugs compared to antibacterial drugs because these organisms

A) do not cause many human infections.
B) are not affected by antimicrobics.
C) are so similar to human cells that drug selective toxicity is difficult.
D) are parasites found inside human cells.
E) have fewer target sites compared to bacteria.