Teacher:In this task you will be given a claim and a perspective. You should determine whether that perspective supports or undermines the claim. If the perspective could possibly convince someone with different view, it is supporting, otherwise it is undermining.
Teacher: Now, understand the problem? Solve this instance: claim: Bottled water should be banned.
 perspective: Invaluable for travellers in areas with unsafe tap water
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
undermine