At a continent-continent convergence,

a. both continental plates are subducted

b. ocean basins are formed

c. folded mountains are produced

d. volcanic mountains cannot form

Option C.

At a continent-continent convergence, folded mountains are produced.

Explanation:

a, i am pretty sure.

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.