Use reasoning to answer the following question.
Which type of system do most animals without backbones have?\nOptions:\n- (A) sensory neurons\n- (B) Veins and arteries.\n- (C) Nervous system\n- (D) Stereo system\n- (E) Root system\n- (F) to move people\n- (G) Skeletal system\n- (H) insects

(C)
Most invertebrates have a nervous system.

Invertebrates are animals without a backbone.

Most animals without backbones have a nervous system.

.

So, the answer is (C)