Which is the definition of a complex sentence? A) A sentence made up of one independent clause.
B) A sentence made up of two independent clauses joined together.
C) A sentence made up of one dependent clause joined to one independent clause.
D) A sentence made up of two independent clauses joined to one or more dependent clauses.

Which two answer choices are examples of complex sentences from the passage?
A) Hiccups are an annoying little fact of life.
B) Iowa farmer Charles Osborne had the hiccups for sixty-eight years.
C) When you breathe normally, you take in air through your nose or mouth.
D) A dome-shaped muscle called the diaphragm assists in the breathing process.