expression
for or against; agree or disagree
A set phrase used to ask someone's stance on an issue, often in discussions or debates.
この提案に賛成か反対か、はっきり言ってください。
Please say clearly whether you are for or against this proposal.
賛成か反対か、意見を聞かせてください。
Let me hear your opinion: are you for or against it?
A compound phrase from 賛成 (agreement) + か (or) + 反対 (opposition) + か (question marker).