What difficulty limited what is now modern Italy in engaging in extern

What difficulty limited what is now modern Italy in engaging in external overseas exploration during the 1400s?

A) Italy lacked competent sailors in its Italian city-states, principalities, and kingdoms.
B) Italy was bitterly divided into many competing, independent free cities, principalities, and small kingdoms that were often at war with each other.
C) The Italian city-states, principalities, and small kingdoms lacked sufficient economic resources to sponsor organized external explorations.
D) Many Italian sailors preferred working for other European governments than for leaders of their own Italian city-states, principalities, and small kingdoms.

ANSWER
Answer: B