Which statement BEST explains why the Renaissance began in Italy?

Responses
A Italy was the victor in the Hundred Years War.Italy was the victor in the Hundred Years War.
B Italian cities were trade centers in the late fourteenth century.Italian cities were trade centers in the late fourteenth century.
C Northern Europe artists arrived bringing their artistic style that the artists copied.Northern Europe artists arrived bringing their artistic style that the artists copied.
D The successful creation of a unified Italian monarchy meant resources were available for art.

B. Italian cities were trade centers in the late fourteenth century.