If i had to answer this question i would go with letter b for a answer
Answer:
The main objective of foreign policy is to use diplomacy — or talking, meeting, and making agreements — to solve international problems. They try to keep problems from developing into conflicts that require military settlements. The President almost always has the primary responsibility for shaping foreign policy.
Explanation:
Federalism is a system of government in which entities such as states or provinces share power with a national government.
Explanation:
Diplomasi adalah amalan mempengaruhi keputusan dan tingkah laku pemerintah asing atau organisasi antara kerajaan melalui dialog, perundingan, dan cara lain yang tidak ganas. ... Kebanyakan diplomasi sekarang dilakukan oleh pegawai yang bertauliah, seperti utusan dan duta besar, melalui pejabat urusan luar negeri yang berdedikasi.
Well without a description om shooting in the dark. But id assume that the answer is Trench Warfare. Since A- was around since contact with Native Americans and largely popular in North America. B- Only was used and discovered in WW2. And C- was used but was largely frowned upon and condemned by both sides.<span />
