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Feudalism helped protect communities from the violence and warfare that broke out after the fall of Rome and the collapse of strong central government in Western Europe. Feudalism secured Western Europe's society and kept out powerful invaders. Feudalism helped restore trade. Lords repaired bridges and roads.
Answer:
compound-complex
Explanation:
"After we left practice" is a dependent clause that isn't a full sentence on its own, and "I went swimming" and "Mark ran around the track" are two independent clauses linked by a conjunction