Between the statements below, which one correctly describes a significant difference between how the endocrine and nervous systems function?

• A. Chemical messengers of the endocrine system diffuse across a synapse, while in the nervous system they travel in the blood.
• B. The nervous system is faster acting than the endocrine system.
• C. The endocrine uses both chemical and electrical signals; the nervous system only uses chemical signals.
• D. Signals transmitted by the endocrine system travel shorter spans than those of the nervous system.