Correct answer is 2. They would feel vulnerable to attack from their neighbors
.
Explanation:
Option 2 is correct as Germany was surrounded with France, among other countries, and therefore they were afraid that in the case of some conflict they wouldn't be prepared to response.
Option 1 is not correct as this is not a reason why any country would be upset with a process of demilitarization, as parades are not used for show.
Option 3 is not correct as every country first focusses on its own needs, therefore alliances are not main reason for their fury.
No, it is not illegal. Actually a lot of schools around the world use this as a method of punishment. In some schools there are not even janitors the kids have to clean the school themselves punishment or not.
If the friend trusts you, understands you, cares for you, and is always(like always by your side when you need help), then they are a very true friend...