Branko Horvat’s historical review of the last two and one-half century indicates that in large part market or decentralized socialism ?

Branko Horvat’s historical review of the last two and one-half century indicates that in large part market or decentralized socialism ?

A. has failed
B. works well in Utopia
C. is widely used in sub Saharan Africa
D. is the only way to eradicate poverty?