Mycoplasmas Are Bacteria That Lack Cell Walls

Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which statement concerning mycoplasmas should be True?

A) They are gram-negative.
B) They are subject to lysis in hypotonic conditions.
C) They lack a cell membrane as well.
D) They undergo ready fossilization in sedimentary rock.
E) They possess typical prokaryotic flagella.