Answer:
Correct answer is b. All had access to the ocean with long coastline, a maritime culture of trade, and they had large port cities.
Step-by-step explanation:
A is not correct as this is not a factor that enabled them to develop their maritime trade. And not all of this countries based their system on Roman Republican model.
B is correct as all of this countries are opened towards the Atlantic ocean, while countries of Central and Eastern Europe had no access to it.
C is not correct as they had different beliefs. Some were Catholics, some were Protestants...
D is not correct, especially this were large countries, especially France and Spain.