To introduce dsRNA into C. elegans, it is enough just to dip the worms into media that includes E. coli containing the dsRNA because __________ .

A) C. elegans emit toxins that paralyze the bacteria
B) E. coli infect C. elegans and then the RNA is released
C) C. elegans feed on the transgenic bacteria
D) E. coli DNA integrates into the genome of C. elegans
E) E. coli emit chemicals that cause pores to open in the nematode body wall