Which of the following is a fundamental characteristic of the Notch pathway?

A) It works through nuclear signals involving the lac operon.
B) It works through direct cell to cell contact.
C) It allows mRNAs to accumulate in the posterior portion of the Drosophila embryo.
D) It directs mRNAs to antisense systems in the posterior portion of all organisms.
E) It provides symmetry to plant flowers.