Which statement best compares a
multicellular organism to a single-celled
organism?

A. a multicellular organism has organ systems that interact
to carry out life functions, while a single-celled carries out life
functions without using organ systems.
B. a single-celled organism carries out fewer life functions than
each cell in a multicellular organism.
C. a multicellular organism always obtains energy through
a process that is different from that used by a single-celled
D. the cell of a single-celled organism is always much larger than
an individual cell of a multicellular organism.