Until the end of the 1700s, the international system functioned almost perfectly. Its structure and norms were not seriously challenged. The Spanish or Austrian Wars of Succession were not sufficiently brutal to jeopardize the international system. However, the French revolutionary process, which started with the French Revolution in 1789 and reached its peak with the proclamation of the French Republic in 1793, posed a serious threat to the structure of the modern international system, which now was standing on the verge of collapse. Tjhe correct answer is A.