Which Statement About the Toxin from B

Multiple Choice

Which statement about the toxin from B.thuringiensis is false?

A) It was applied as a pesticide long before it was added to plants via recombinant DNA.
B) Many different transgenic crops are grown with the toxin.
C) The use of this toxin has greatly reduced the need for pesticides.
D) The toxin acts primarily against vertebrate pests.
E) The toxin must be ingested by a pest to cause harm.