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I'm going to go with complex. </span>
<span>Complex sentences has an independent clause and a dependent clause. Your independent clause is: Teresa brought us paper plates. Dependent clause would be For our sandwiches. </span>
<span /><span>For a compound sentence to occur you would need two clauses to be joined together as one sentence. Usually one of the indications to a compound sentence is if there are either a semicolon, colon, a conjunction (...,and) with a comma, a dash mark (ie -), a conjunction with a semicolon (...; but). Compound sentences have two or more independent clauses. </span><span>complex sentence can have one or more dependent clauses (meaning they cannot stand alone.... more information is needed for the sentence to be complete and not sound like a fragment) and one independent clause (can stand alone... no more information is needed. The sentence is complete...not a fragment). </span>
<span>Simple sentence has one independent clause. It is a complete sentence.</span>
<span />Hopefully this helped and good luck