Wild pandas are rapidly decreasing, so to protect the species, existing wild pandas should be captured and placed in zoos around the world. Which of the following, if correct, raises the most serious questions about the above conclusions? ['Wild pandas usually give birth to more pups when locked up than in wild habitats.', 'Giant pandas just born in the zoo are not likely to die from infectious diseases, but wild pandas are likely to die from these diseases.', 'It is difficult to get a sufficient amount of bamboo outside the habitat of wild pandas, which is the only food for pandas.', "The number of individuals that can survive to adulthood in the zoo's giant pandas and wild giant pandas' offspring is comparable."]