Context: Not all introduced species are invasive, nor all invasive species deliberately introduced. In cases such as the zebra mussel, invasion of US waterways was unintentional. In other cases, such as mongooses in Hawaii, the introduction is deliberate but ineffective (nocturnal rats were not vulnerable to the diurnal mongoose). In other cases, such as oil palms in Indonesia and Malaysia, the introduction produces substantial economic benefits, but the benefits are accompanied by costly unintended consequences.

Question: What animal unintentionally invaded the US waterways?
Answer: the zebra mussel

Question: What animal intentionally invaded Hawaii?
Answer: mongooses

Question: What animals were not vulnerable to the mongoose?
Answer: nocturnal rats

Question: What countries experienced unintended consequences from species invasion?
Answer: Indonesia and Malaysia,

Question: What animal intentionally invaded the US waterways?
Answer: Unanswerable

Question: What animal unintentionally invaded Hawaii?
Answer: Unanswerable

Question: What animals were not vulnerable to the zebra mussel?
Answer: Unanswerable

Question: What countries experienced intended consequences from species invasion?
Answer: Unanswerable

Question: What is true about the introduction of the zebra mussel in Hawaii?
Answer: Unanswerable