which of the following best describes the function of the endocrine system

A. it secretes chemical messengers that travel through the blood to signal changes at target cells.

B. It blinds chemical messengers that travel through the blood from target cells.

C. It releases electrical impulses that travel through body cells to signal changes at target cells.

D. It converts chemical messages into electrical impulses to signal changes at target cells.

Is it A

Yes, you are correct :)