According to Branko Horvat's historical analysis of the past 250 years, what has been the general outcome of market-based or decentralized socialism?
Explanation
Branko Horvat's review shows that market or decentralized socialism has mostly failed to achieve its goals over the last two and a half centuries. While it may seem effective in theoretical or perfect conditions (option B), it has not been widely adopted in sub-Saharan Africa (option C), nor is it considered the only method to eradicate poverty (option D). Therefore, the correct conclusion is that it has largely failed.