Final answer:
The sentence 'Should I bake cookies, or should I bake muffins?' is a compound sentence because it contains two independent clauses joined by the coordinating conjunction 'or'.
Step-by-step explanation:
The sentence 'Should I bake cookies, or should I bake muffins?' is a compound sentence because it contains two independent clauses joined by the coordinating conjunction 'or'. Each clause, 'Should I bake cookies' and 'Should I bake muffins', can stand alone as a complete sentence.