What does the term "deeply branching bacteria" mean?

A) The bacteria likely branched from other Bacteria very early.
B) The bacteria grow in long filaments with frequent branches.
C) The bacteria grow in environments far below the surface of the Earth.
D) The bacterial cells have a Y or "branched" shape.
E) This group of bacteria have ribosomal RNAs very divergent from the rest of the members of the domain Bacteria.