which is a complete sentence? ships find their locations with satellite navigation systems, similar…

which is a complete sentence? ships find their locations with satellite navigation systems, similar satellites are used for cars gps. the presence of soviet missiles in cuba contributed to the cuban missile crisis of 1962.
Answer
Brief Explanations:
A complete sentence has a subject and a predicate and expresses a complete thought. Both given options have a subject - predicate structure and convey full ideas.
Answer:
Both sentences are complete sentences. The first sentence "Ships find their locations with satellite navigation systems, similar satellites are used for cars' GPS." has two related independent clauses. The second sentence "The presence of Soviet missiles in Cuba contributed to the Cuban Missile Crisis of 1962." has a subject "The presence of Soviet missiles in Cuba" and a predicate "contributed to the Cuban Missile Crisis of 1962" and expresses a complete thought.