he JCVI is challenging which part of cell theory?

Choose one:
A. The JCVI challenges both major ideas posed by cell theory.
B. The JCVI challenges the idea that all cells come from preexisting cells.
C. The JCVI challenges the idea that every living organism is composed of one or more cells.
D. The JCVI challenges neither major idea posed by cell theory.

B. The JCVI challenges the idea that all cells come from preexisting cells.