This is of course a very subjective question, but most would argue that it is rather reasonable for the EU to have been slow to meet its energy goals, since it is dealing with a large number of separate countries with different emissions patterns.
1.Stable food
2.Government
3.Technology
4. Religion
5.Writing systems
6.Social structure
7.Arts and architecture
I right now Am answering this question too I would go with B or C
1. Angle B
2. 90 degrees
3. Transitive Property
4. Measure of angle A
5. Angle A