Answer:
B
Step-by-step explanation:
I think this is the right one. A is wrong because 20th Century socialist economies (if this is what the question is referring to) were not individualist, no self interest. C is wrong because there is less competition in socialist economies (generally). And D is wrong because the government does internvene in socialist economies. So B is right, the government intervenes and tries to distribute resources evenly (as long as B is talking about a socialist economy which I think it is).