Answer and Explanation:
Furthermore, the nation became committed to far horizons and new frontiers. The resultant effect, a sustenance of the pioneer spirit of American life. The spirit which is of equality and hope, always alive and strong.
A compound sentence is a sentence that has at least two independent clauses, which are usually joined by conjunctions. A compound sentence does not have a dependent clause.
A complex sentence on the other hand can have one or more independent clauses as well as dependent clauses.
Note: A dependent clause is a complete thought with a subject and a predicate that is not able to stand alone unlike the independent clause.