Organs Can Perform Unique Functions That Differ from Those That

Organs can perform unique functions that differ from those that the tissues from which they are made can perform individually.Why is this?

A) Organs are always made of more cells than are tissues.
B) Tissues cannot form the same shapes that organs can;organs,therefore,have more functions than tissues.
C) The cell types of an organ work together to create new,unique functions.
D) Organs have stem cells,whereas tissues do not;organs can grow new cells with functions that are different from tissues.
E) The cells of a tissue are flat,whereas the cells of an organ are round;round cells create more functionality.