Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'regulation of ethylene biosynthetic process'?

A. Any process that modulates the frequency, rate, or extent of an ethylene biosynthetic process.
B. Any process that modulates the frequency, rate or extent of the chemical reactions and pathways involving homocysteine, the amino acid alpha-amino-gamma-mercaptobutanoic acid.
C. Any process that activates or increases the frequency, rate or extent of an ethylene biosynthetic process.
D. Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways involving sulfur amino acids.

Answer: Any process that modulates the frequency, rate, or extent of an ethylene biosynthetic process.