Which of the following is NOT true about laboratory strains of E. coli being desirable hosts for genetic engineering?

A) E. coli is fastidious but can usually be grown in the lab.
B) The genetics of E. coli is very well known.
C) E. coli is especially able to express foreign genes.
D) E. coli has known phenotypic characteristics.
E) All of the answer choices are correct.