Which Description Best Defines Nanofabrication

Which description best defines nanofabrication?

A) The study of controlling and altering matter at the atomic or molecular level
B) The development of materials used in structures, electronics, and commercial products
C) A subdiscipline of nanotechnology centering on the application of nanoparticles and nanoscience techniques to healthcare and clinical research
D) The use of biomedical informatics techniques and tools for nanoparticle data and information to improve research in the field of nanotechnology