instruction:
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.
question:
claim: Gay couples should be allowed to marry.
 perspective: Legalizing gay marriage often leads to an end to domestic partnership benefits for gay and straight couples, which disadvantages couples who choose not to get married. 
answer:
undermine


question:
claim: Sanctions should be used to promote democracy.
 perspective: Sanctions do not harm the right people.
answer:
undermine


question:
claim: Parents should be able to choose the sex of their children.
 perspective: Pre-selection of gender uses expensive medical care for frivolous purposes
answer:

undermine