which of the following was the way prussia pursued german unification

diplomacy
trade policies
military and war
domestic policies

All of the above were ways in which Prussia pursued German unification. Prussia employed diplomacy by forming alliances and negotiating with other German states to gain support for its goal of unification. Trade policies were used to promote economic integration among the German states and to solidify Prussia's economic influence. Prussia also relied on military force and wars (such as the Austro-Prussian War and the Franco-Prussian War) to assert its dominance and achieve unification. Additionally, Prussia implemented domestic policies that promoted nationalism and centralized authority, such as the introduction of universal military conscription and the implementation of a unified legal system.