Roundup Ready corn is a transgenic crop that is resistant to the herbicide Roundup (glyphosate). ...

Roundup Ready corn is a transgenic crop that is resistant to the herbicide Roundup (glyphosate). What is the main reason that farmers would want to plant Roundup Ready corn?
 
  A) Water supplies are often contaminated with Roundup, which typically kills corn. Such contaminated water can be used only on Roundup Ready crops.
  B) Farmers can use Roundup on the weeds in their cornfields without killing their corn.
  C) Roundup Ready corn produces its own herbicide, which would kill nearby weeds without the farmers having herbicides on their fields.
  D) Many farmers have problems with airborne Roundup drifting in from nearby farms, and Roundup Ready corn would be protected from such airborne herbicide.