Which of the following holds true for Escherichia coli?

• A

  E. coli has roughly 40 minutes of doubling time.

• B

  E. coli is a parasite in human digestive tract.

• C

  E. coli has $4.6 \times {10}^9$bp long genetic material.

• D

  E. coli has $4.6 \times {10}^6$bp long genetic material.