It is A a cell also knows as white cell
(see attached picture)
Answer - D. (The genetic code)
The genetic code is the nucleotide base sequence on DNA (with which information is encoded within genetic material). The nucleotide base sequence<span> codes for a sequence of amino acids, which are in turn used by living cells as the basic building blocks of proteins.</span>

Actually Welcome to the Concept of the Biology
So the answer is,
Genetic Information is bundled into packages of DNA known as Chromosomes.
Answer:
"Endocrine Organs and the Nervous system II. Nerves and hormones work together to regulate function of the human digestive system; they control muscular contractions and the rate of secretion from digestive organs. ... Several hormones coordinate digestive functions of the stomach, pancreas and gall bladder."
Explanation: :)