Tropheryma Whipplei Is the Causative Agent for Whipple's Disease

Multiple Choice

Tropheryma whipplei is the causative agent for Whipple's disease. It could not be cultured until recently, when the genomic data showed that it

A) was auxotrophic for some amino acids.
B) was an obligate intracellular pathogen.
C) needed a helper virus to grow.
D) needed high levels of iron.
E) is a virus that needs cell culture.