What is biotechnology?

I. Biotechnology is a set of techniques applied to the obtaining of products through the metabolic activity of living organisms.
II. Biotechnology is the use of biological systems, living organisms, or derivatives of them, to generate or modify products or processes for a specific use.
III. Biotechnology is the use of microorganisms or parts of the organism (cells, enzymes, genes, proteins, carbohydrates...) to obtain a procedure, product, or service.
IV. Biotechnology is a discipline that involves only biology, biochemistry, and genetics.
a) I and II are correct.
b) II and III are correct.
c) I, II, and III are correct.
d) III and IV are correct.