Why are transgenic bacteria used to produce insulin? A. Bacterial cells are smaller and require less energy to reproduce.

B. Bacterial cells contain many copies of DNA within their nuclei, so insulin is produced quickly.

C. Bacterial cells reproduce quickly, so once the DNA is inserted, insulin can be harvested faster than with other types of cells.

D. Bacterial cells and human DNA are almost identical to one another, which makes bacterial cells very compatible with our own DNA.