although the crayfish has an inflexible cephalothorax, why is the crayfish classified as a segmented animal
Options: 
a) The crayfish exhibits segmentation in its appendages and abdomen. 
b) The crayfish undergoes a process of segmentation during its life cycle. 
c) The crayfish's exoskeleton is segmented despite the inflexible cephalothorax. 
d) The crayfish belongs to a group of animals with segmented body plans.