Type i interferons choose one:
a. reduce cellular levels of double-stranded rna endonucleases.
b. are produced in response to extracellular pathogens.
c. are not host species specific (e. g., rabbit interferon will work in mice).
d. protect cells from viral infection.

The answer is D. help protect cells from viral infection.

Explanation:

Interferons are proteins or glycoproteins that different cell types produce in response to various stimuli among which viral infections stand out.

Type I interferons are synthesized in the initial stages of infection or even before other immune responses are activated. they possess the antiviral, anti-proliferative and immunomodulatory properties and their synthesis is induced in response to the presence of single or double stranded viral RNA, to avoid their replication.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.