The right option is A) venom glands and varied diet
The venom glands and varied diet are most responsible for the success of the cane toad as an invasive species in Australia.
The cane toad is a big terrestrial toad usually used as pest control against the cane beetle. The cane toads have a toxic skin and venom glands behind their eyes that secrete toxins. The toxins kill animals when it is ingested. The cane toads also have a varied diet. They consume various types of materials such as household garbage, plants in addition to the usual preys of reptiles and birds.
