Gorilla populations have been ransacked by the Ebola virus, which has

Gorilla populations have been ransacked by the Ebola virus, which has killed an estimated 90 percent of the gorilla population in each area of western and central Africa where it has been found. Like humans, gorillas tend to have a single offspring at one time, with each one gestating for about nine months. Females do not mature until around age six, and nearly half of baby gorillas do not survive till breeding age. The numberone threat to gorillas, however, is human greed. Humans are burning down the forests where the last remaining gorilla families live. They are doing this to harvest charcoal, which is used to fuel cooking fires throughout the region. In addition, they are poaching the last remaining gorillas for meat and for their hands or other parts, which are considered a delicacy in Africa and are used medicinally in parts of Asia. Despite the best efforts of dedicated conservationists and African rangers, some give these vegetarian cousins of Homo sapiens no more than a decade before all wild specimens are eradicated.

Which new information, if true, would most challenge the claim that gorillas have only a decade before extinction in the wild?

(A) A new transboundary law outlawing any human incursion into gorilla habitat
(B) The discovery of a vaccine against Ebola in humans
(C) Successful breeding of Mountain with Lowland gorillas in a zoo setting
(D) Observations of several twin babies in existing gorilla families
(E) Signs warning tourists to stay away from gorilla breeding grounds