Read the following statements and choose the correct option:
$(A)$ The cockroach nervous system consists of a series of fused,segmentally arranged ganglia.
$(B)$ Ganglia are joined in the cockroach by paired longitudinal connectives on the ventral side.
$(C)$ The nervous system is present on the dorsal side of the cockroach.
$(D)$ In the cockroach,the total number of ganglia is nine.

• A
  All statements are correct
• B
  Only $A, B$ and $C$ are correct
• C
  Only $A, B$ and $D$ are correct
• D
  Only $B, C$ and $D$ are correct