Which strategy aims to limit the spread of nuclear weapons through negotiations?

The strategy that aims to limit the spread of nuclear weapons through negotiations is disarmament. Disarmament involves reducing or eliminating a country's stockpile of nuclear weapons in order to decrease the threat of nuclear proliferation. This often includes treaties and agreements between nations, where they negotiate terms to either reduce their arsenals or commit to not developing new nuclear weapons, ultimately working towards a world with fewer nuclear threats.

In contrast, diplomacy refers more broadly to the management of relationships between countries, which might involve discussions on various issues, not solely focused on nuclear weapons. Deterrence is a military strategy that relies on the threat of retaliation to prevent an adversary from taking an action, such as using nuclear weapons, rather than limiting their spread. Brinkmanship is a strategy of escalating threats to achieve a favorable outcome in negotiations, but it doesn't directly address the aim of limiting nuclear proliferation in a cooperative manner. Therefore, disarmament stands out as the most appropriate answer in the context of negotiations aimed specifically at reducing nuclear arms.