The options of the question are:
a) to identify the major military threats to Renaissance Italy
b) to support the idea that commerce centered in Italy led to the Renaissance
c) to justify the splintering that took place within Italy as a result of Renaissance political reforms
d) to describe the concentration of power in Italian city-states during the Renaissance
The correct answer is a) to identify the major military threats to Renaissance Italy.
<em>A historian most likely uses this map to identify the major military threats to Renaissance Italy.
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The map shows the Italian Renaissance cities with its most important locations, trade routes and Banks, locations. So, with these important locations of the Renassaince Italy well identified, a historian can sign where were the major military threats that could attack those places. The map shows where were the vulnerable places for that region, the places, and routes to get there.